Claude

This Week in Startups

uses recommends mentioned

"I'm spending as a company $40,000 on Claude, Cursor, Lovable, ElevenLabs. This long tail of things. And I calculated I'm getting $2 million in value."

Greg Isenberg

uses recommends mentioned Opus 5.5 · newest

"I was one of those people that hated short form video. I like to consume it, but I hated it from a creation standpoint. I hated the editing around it. Now I have Opus 5.5 as my editor, and I can go and create short form on the fly when it works fo..."

Chris Koerner

uses recommends mentioned

"Yeah, I kind of just did that. I said, "Find me 20 highly engaged subscribers that likely have a high net worth based on everything you or Beehiiv knows about them." ... Oh, look at this. Look at this brand new segment."

Liam Ottley

uses recommends mentioned

"You need to learn how to build. So, get yourself a Codex or a Claude plan. Build some stuff for yourself."

Tom Bilyeu

uses recommends mentioned

"I think people look at AI as a commodity, and I use Claude right now, but if OpenAI came out with something that was substantively better, I would switch immediately."

Riley Brown

uses recommends mentioned Opus 5.5 · newest

"Claude Opus 5.5 right now, in my opinion, at least for the things that I'm doing, is the best at coding. And so it's best at creating apps, especially if it is very front-end focused... GPT-6 Soul is also frontier and it's amazing. It's just not t..."

Ali Abdaal

uses recommends mentioned Opus 5.5 · newest

"It took about 6 hours from start to finish, and it didn't cost anything on top of my Claude subscription. And now that I've done this once, I've firstly got all of the code that Claude generated, and so it'd be easier to do it again."

Peter Yang

uses recommends mentioned Opus 5.5 · newest

"Yeah, and this has only happened really in the past, basically with Opus 5.5... So I think this is a massive time-saver... I highly encourage everyone watching this to get Opus to make launch videos for everything or help it edit your videos."

Tim Ferriss

uses recommends mentioned

"Speak into Wispr Flow, for instance, so it transcribes your 10-minute brain dump, and you can throw it into something like Claude for cleanup."

Dan Shipper

uses recommends mentioned Fable 5.1 · newest

"We had Fable 5.1 launched last week and these are sick models. I made this Battle of Waterloo 3D historical reproduction that's historically accurate with a single prompt and it just ran for like 4 hours and then I got that. That's crazy."

"If you want to compare that against the best run so far of the models I've tested, this is Opus 5.5... it has these much more complex curved shapes."

"You can even use Claude to manage your browser and do your ads. This is a great moment in time right now where you can use AI to do those sort of things that were not possible before."

Ras Mic

uses recommends Fable 51 version old · newest is Fable 5.1

"Fable is in a class of its own. I built a Daytona alternative — spinning up your own sandboxes on a bare metal server. I built a multiplayer Vice City game. I ported Eve so it can fully run on Convex. This is something I could have done but it wou..."

Codie Sanchez

uses recommends

"Claude is the best at thinking and nuanced writing. You use Claude when you need to think through something deeply or when the quality of the reasoning matters or if you want to use agents."

Every

uses recommends mentioned Opus 4.82 versions old · newest is Opus 5.5

"The best model score is a 63 out of 100, which is Opus 4.8, which came out like 2 weeks ago. If you're a Claude person, just use 4.8."

Alex Finn

uses recommends Opus 4.82 versions old · newest is Opus 5.5

"Opus very expensive model. I think Opus 48's the smartest AI model out there. It's also very pricey. So if I'm doing high-level thinking and strategy, I'm going Opus."

Peter Diamandis

uses mentioned Opus 51 version old · newest is Opus 5.5

"Anthropic shipped Claude Opus 5. This is their fourth Claude 5 generation release and it approaches the frontier intelligence of Fable 5 at half the price. I made the switch immediately on Skippy for myself."

Kevin Rose

uses mentioned

"I'm playing with everything. Literally, like I can't keep track... But yeah, I'm using right now Claude, ChatGPT, Gemini for some things."

"I gave Claude a way to keep improving the skill and then check whether it's doing a good job. So the way the eval metric works, it gets Claude to generate the writing. It's given a brief... And that works. And it's kind of simple, it's kind of ele..."

"And so that allows me to still have fun and still play with my boy Claude, who's not really a boy, but you know, a business model masquerading as a personality, but it's very helpful. It's very helpful."

"I'll ask some other folks that know maybe a little more about tech, or I'll probably just ask Claude for Christ's sake."

"I don't think we talk about it, but I think Haiku from Anthropic is a pretty damn good product and in one day they could make it better just by adjusting the slider of how much Opus you get in Haiku. I literally use a massive amount of Haiku and f..."

"So the only tab that is really open is Claude. But we don't have the multiple tabs of like this, this, and this, cuz now it's all connected. I just asked Claude within the AI operating system; we've got 45 agents running right now."

"I love Claude. I'll literally just start a voice memo and I'll just go and go and go, and then I'll say, come back to me with five points... I just start a voice memo, talk for five minutes, and it's able to synthesize all of that information very..."

"In my case, we program these models. Well, now all of a sudden in Claude and ChatGPT, you know, I have a couple of expert programmers that work very quickly. They're not great at model design. They're not great at the empirical questions, but in t..."

Emad Mostaque

uses mentioned Fable

"You can access Fable 5.5 now, sometimes with Fable 5.1, and it literally generates entire video games out of the box. Like I generated one with 21 bosses, 15 different biomes, end to end. It's just a top-notch game that our QA testers, agents, tri..."

"I start with Grok, GLM-5.2, and I also put it into Claude and the results are as good or better. I can't even tell the difference between these."

"I'm a user of Claude. I think we get a lot of value for Claude. I think our people are able to do more because of Claude than they would otherwise be able to do. So our business grows faster, we can get more done in a shorter period of time. I thi..."

"Where I think Claude is great is being an editor so my content is free of mistakes and errors and calls out factually incorrect things, right? And so every time that I'm done writing one of my posts, I just drop the entire draft into Claude. It's ..."

Jason Lemkin

uses mentioned Haiku 5.5 · newest

"Haiku 5.5... it's almost as good for a lot of use cases as Sonnet. And it's a tenth or a twentieth the price. It's shocking, it's so cheap. Haiku 5.5 is like the first reasoning model, and you can dial up how much reasoning you want, where you can..."

"I've lived in Claude for a long time. So, it's the room I keep going back to and I will say, Claude, here's a folder of all my work. You know what I do? Let's talk about this... I will have a very long conversation with Claude about the reality of..."

Dave Blundin

uses mentioned Fable 51 version old · newest is Fable 5.1

"A month ago, to fine-tune these things required some huge engineering effort that required AI experts. Now with Fable 5, it's just a prompt."

"This is something that's gotten easier than ever. Like, absolutely, Claude is my data scientist. And so I would say now everybody on our team is constantly armed with very fine-grained analysis of failure modes and opportunities."

Claire Vo

uses mentioned Opus

"I really only do my coding in Claude and Codex."

"Then we take it, I sort of run it through AI as a brainstorming layer. I usually use Claude. Opus is ideal for this. You could use Sonnet... I don't let Claude write anything... I let Claude kind of roughly assemble it. And then I take the suggest..."

"I'm lazy, and I just asked Claude to use HeyGen to generate different characters and then have them speak a couple clips... and I didn't even ask for myself to be in there. That was actually Claude's discretion."

"I go to Claude and say, 'Hey Claude, read chapter eight and read chapter nine and write me a transition.' Woosh... Well, that turns out to be exactly right. I couldn't see it, but Claude could see it."

"I just gave Claude Pro, I think, permission to access my Gmail. And it's just... it sounds obvious, but it's just been mind-blowing. I get an email from someone saying, you know, a capital call on a fund I invested in three years ago... I just say..."

"It's probably 50/50 right now between Codex and Claude. And that's obviously changed a lot. Like I think 5 months ago I would have said it was mostly Claude. But the new Codex is really good."

Sam Parr

uses

"I had this idea where we basically exported his brokerage account, and we put it in Claude, and we asked it over the last 12 years, how many decisions did you make a year?"

"I use extensively Codex and Claude... but I will say at this point, 99% of the stuff that is left to be done is Claude waking up every morning and then running the guide, and that's kind of it."

"Before Opus 4.5, I really couldn't let Claude cook too much on my code without a short leash, and then after 4.5 I could... At some point they could write small snippets of code basically all the time, and so now I don't write small snippets. Like..."

"If you do want to create some sort of new dashboard, some sort of verbal spreadsheet or whatever, you just tell Claude what you want. You don't have this learning curve. All of SaaS is being impacted right now, but this has got to be the most impa..."

"The latest thing that I do is I use Opus 5.5... It's an amazing model. And I've shipped in the last two weeks these massive 20 PR things that I just dump on my team to go and review."

"I'm using Claude as well and like Codex maxing. It's amazing how you can imbue it with your taste"

"I put my symptoms into Claude and Claude sort of said, 'This isn't the kind of thing like going next week when you have a chance. This is the kind of thing like going right now. If you can't be seen right now, go to an emergency room.' And Claude ..."

"I am a Claude girly through and through for writing, particularly with Opus 5.5 and Sonnet 5.5 coming out... Part of the reason I prefer Claude is that Claude talks more like me naturally."

"I still prefer Opus for writing just because I like the neuroticism element like it it is it's very witty, right? Opus is very witty"

"I write all my own first drafts, right? Because I want them to be my voice, but if I didn't have Claude checking all the answers, you know, what I write to make sure it makes sense, it would take me days to put out a piece that takes me a few hour..."

"This agent runs on Opus 5.5, on Claude Managed Agents, like what the article says. And so it's able to just really do this with code."

"I have built personal operating systems in Claude and whatnot that I find really helpful as like a chief of staff for big complex projects that take all the inputs from, whether it's Granola or calendar and email, with all the research I do around..."

"I would stay up late and I would get a plan made for Claude, build out a plan, and then I tell Claude, like, I get as far as I can and say run this all night."

"Now that doesn't mean that we're not using their models. We're using, you know, Opus 4.8 or Sonnet more likely."

"It was so easy with the Opus 5.5 recently just to kind of wing it and take it different directions and go through scenarios and see the cases that were exposed."

Simon Willison

uses mentioned

"These days, I'll often just tell Claude, here's a URL to this thing, here's another thing. Go and read the source code and then solve this new problem. And it works so well."

"We've had Claude both sort of keep an eye on how everything is going, but also create the UI by which first the TPM and then the entire team understands what is happening in that project. One of the biggest shifts in how we've worked in the last y..."

"Aerodome gave us their initial report of exactly what happened and we were able to feed it into Claude and give it into a granular level of exactly what happened."

Graham Stephan

uses mentioned

"So here's a really good way to digest a ton of research. If you open up Claude, you create a project. This is one of the ways that I researched you for this podcast. I downloaded the transcript for every single one of the podcasts, saved it as a P..."

"From March to June, everyone really moved to Claude, including the creative team, and that's where we actually started to see the creative team vibe coding functionality which we don't have in production. But then we started to see that all the co..."

"I went to regular Claude first and I just gave it a bunch of detail. Here's all this information I have for a game. Do some research on MapTap and I had to build a spec. I'm not technical. I don't know how to code. Every step of the way when I wou..."

Chamath Palihapitiya

uses mentioned Opus 47 versions old · newest is Opus 5.5

"We ran an experiment where we did Claude by itself, then we did us plus Claude. When you use our harness with Claude, it was simultaneously 1.4x cheaper and 1.5x faster than just using Anthropic Opus 4 alone."

"Now with Claude and ChatGPT and Gemini and Grok, my research — I mean I can't even comprehend how much I've learned in the last year about building an intellectual property that would have taken me 800 hours that took me eight."

"I've been using Claude and ChatGPT. I'm using all of these services as a way to speed up my work."

"Opus 5.5 is where things just get crazy. It is very very well polished, there are really high quality interactive elements everywhere. It's a better UI designer and a better teacher and this comes from its ability to just be a better writer and be..."

"Claude and ChatGPT help me a lot. They were my ghost writers."

"Claude — everyone's using Claude, we're no different. We need it to survive at this point."

"I'll use Gemini for processing video and audio — I think it's particularly great at that. Claude for marketing content, ChatGPT for writing and research. Found that was much better at adapting to my voice."

Steven Bartlett

uses mentioned

"If I went on my Claude now and said, 'What's my dog's name?' It would know my dog's name. I'm using an extreme simplified example to show that it can remember things from the past."

"Design a couple months ago wasn't that great. But I think with both Claude and the new ChatGPT, especially the image generator, some of the designs are just spectacular. They're better than anything I've seen any human do. And so when I now think ..."

"Last night I worked out a physics problem with Claude, which I couldn't work out with my student. So, of course, Claude is very intelligent. Claude, the AI system."

"Our engineers stopped coding around a year ago. What they have is hundreds of AI engineers that they code for them. What tooling do you use? Mainly Claude. How much do you spend on Claude a month? It keeps growing so fast — it's still in the milli..."

"I actually use Claude. That was my first time doing that which was very fun. I'm a big Claude fan and getting to actually do end-to-end development — it's kind of funny to call it that because we don't know what we're doing. You're just kind of wa..."

"We're a Claude shop here. We have a bunch of information living in Claude, hopefully in secure ways."

"Me and my team, we use Claude everywhere. We love to use Claude with MCPs, and we connect to analytics tools like PostHog or Superwall or RevenueCat with MCP, and see all of our data from there."

"I think maybe around Opus 4.5 or Opus 4.6 they more or less caught up. Some experimentation suggests to me they're pretty neck and neck, and so for my own work, except when I'm just experimenting, I mostly just stick with one."

"We use OpenAI and Claude models just to generate the copy and generate the captions. We also plugged all our customer call notes into Claude to build our customer intelligence dashboard."

"I used Claude the other day for something useful. My kid loves Minecraft. I was trying to fix a broken mod because he loves his wither storm. It still took me half an hour and kept getting things wrong."

David Heinemeier Hansson

uses Opus 4.55 versions old · newest is Opus 5.5

"November 24th, 2025. Opus 4.5, to me, was the dividing line, where suddenly I give it a couple of tasks, and I realize that the quality of the output is uncannily close to what I would've written. And I remember just leaning back and thinking, 'Wh..."

"Nowadays you're hanging in Claude, you're hanging in Cursor or whatever it is that you like using. And you can build inside Claude, which is really nice because Claude — the natural language style of building is just way better than the no-code st..."

"I'm going to start out by just invoking a Claude session. The interface that it comes up with is going to be so much better than me looking at my data in say Google Sheets or something. It's just very very hard on the human eyes to read."

"Claude is really bad right now for image generation. It is great — amazing for everything else. We use ChatGPT and Claude."

"If you haven't tried building something with Claude or ChatGPT, something that's in your head, could be a game, it could be a dashboard, it could be your finances, it could be your stock market portfolio, and realize that you too can now program a..."

"With a skill, it basically just allows you to package up your entire kind of way of doing things into a document, a markdown file for Claude to read. I literally just ran before this a demo — I said 'Create a proposal for Greg Isenberg for the sta..."

"We just created a Claude agent thing called product assistant that basically summarizes all the discussions in Slack. It basically divides them into two categories — decisions that are left outstanding and decisions that were made. And every day a..."

"ChatGPT or Claude can literally just make a deck for me with like the entire synopsis of the artist, which is awesome."

"I still use Claude for a lot of my coding tasks. I still use Codex too. But for the daily driver for knowledge work, right now it's just Codex on a MacBook Pro."

"I have Claude plugged into my email with cron set up to essentially check at 9, check at noon, check at 6 — are there any new newsletter requests?"

Shaan Puri

uses mentioned

"I was talking last night and I was like, 'Claude, why am I so indecisive?' And then my wife was like — she could hear everything I'm talking to Claude about now."

"We've been able to essentially reconfigure Claude Cowork to do an outbound sales motion to property managers in the area, increase the number of bids out on a weekly basis and win rate."

"We have Claude in every single one of our chat channels. I have a Slack channel called Loop Allie — my freaking human team can talk to my AI workforce in that Slack channel. And don't be scared if Claude emoji reacts to a lot of your messages."

Garry Tan

uses mentioned

"I actually had to go into Claude, and I said, 'Reduce this by 90%. Reduce the strength and intensity of this prompt by 90%.' And then I open-sourced that."

Peter Steinberger

uses

"The main thing that really hurt the project was Anthropic. It was the fact that I optimized too much on their model. The harness for a long time really worked the best and was optimized for Claude."

"Once I was done, I fed it into Fable and said, 'How could this be better?' It gave me a narrative suggestion that was actually pretty good. I probably accepted 80% of it. Then I said, 'Go through every word in this presentation and make suggestion..."

"My Claude is ingesting all of that and correlating it with a bunch of context. I voice note Claude anytime I take a walk or go to the gym and say, 'I worked out. Can you track all of these exercises and update a spreadsheet for me?' Claude and I h..."

"I use Claude for coding and AI agents across the business, which is $200 per month."

Michael Ovitz

uses

"I have it sitting on my phone. It's insane how many times I go to my phone and go to Claude or OpenAI or Google to get answers on things and get a deep dive in a nanosecond."

"Fable is a wonderful model. I think that's probably the best visual taste right now. It's very slow. That's why I don't use it for demos. If I need pure taste, it's Fable and the Anthropic models in general."

Cody Schneider

uses SonnetSaid Aug 2026, when Sonnet 5 was newest

"We've even used just Claude Sonnet as an example and it's probably good enough on the writing side."

"You can try to tell Claude, you know, don't make anything up. I only want — double check, make sure the case really exists — and it'll kind of be apologetic and say, you know, I'm just an LLM. I can't guarantee that."

"I can sit and talk to Claude and understand roughly LOEs. I can sit there and go through and be like, it feels like there's some car crash of models that must be hitting new users as they open up the app, and you can literally just go through and ..."

"Mark at one point had posted the prompt that he used for Claude where it's like, disagree with me, be very direct, things like that. So I actually used that. It was great. And the funny story on this was I really enjoyed it because it would disagr..."

"I actually used that for a while — Mark at one point had posted the prompt he used for Claude where it's like, disagree with me, be very direct, things like that. It was great. It would disagree with me very aggressively. I took it to my wife and ..."

"Having Claude synced up to my computer, I can pull from different files where I have different information on companies that I want to query quickly. The information retrieval and review are just sped up a lot."

"Fizz is a Fable model and Honey is Sonnet because there are certain tasks that I don't need to use the power of Fable and burn through tokens so fast."

"I get a very hefty just a prompt. That's fine. I trust Claude, so we'll move on to the next step from there."

"Eight weeks ago I was primarily in Opus and Claude Code — that was my workhorse, like 90% of my time was in it."

"I'm locking in on Claude just because that's where I'm staying at the moment. I think that — and you've just given me permission to just ignore everything else."

"The Claude integration is so incredible that we've been experimenting with it and I feel like we've done maybe half a percent of what it really can do. We've got it to where it'll reach into Zox and Zox is reaching into Wealthbox to look at all pr..."

"I put out this weird — I called it a generative book — like within Claude about the marginal revolution from the 1870s."

"The content machine lives as a plugin in 10X's internal Claude, and basically everyone has added it to their machine. Anytime I'm pushing an update to it on Git, people can just auto-update it right from here. Let me bring up my Claude and I'll ju..."

"I have Claude with PostHog as well. All the data sources are in one. So I have a Claude that I could literally talk to like an MCP. I'll be like, 'Hey, what are the numbers for today? What's my P&L?' It's sick. Claude, make this the most deep apol..."

"We've now built in-house an agent that runs on Claude that does this end to end — it goes to the website, it verifies the license, it goes and reads the transcript, it puts it all together, it stamps it for approval. We're now averaging about 12 h..."

"Anthropic has been the sort of workhorse for over a year right now. It's just like the core agent loop because it can run for a long time coherently."

"Claude's more than doubled my money already. So, pretty sweet. Claude's killing it. So, everybody just needs to try to catch up to Claude on here."

"It's great. The stuff that it's doing right now is going across all of our code bases, refactoring things, showing where we've been inefficient. Opus was insanely good, too. But the level of sophistication — it feels like the exact same kind of fe..."

Corey Ganim

uses

"90% of the time the answer is a Claude Skill, I will say. A lot of what we prescribe is a Claude Skill for a very specific workflow. Most business owners have never built a Claude Skill, which leads itself perfectly into our AI concierge upsell."

"If you're a Claude user, they have — I think are they called routines on Claude right now? — and Cursor has automation. And I think Codex, it's also called automations. So you can run one of those and the idea is just every few weeks it should pic..."

"I used Claude Code, literally just normal Claude, to be honest — it has incredible design capabilities. And now with AI and tools like Claude Code and Cursor, that technical barrier has been eliminated to a large degree."

"I've had conversations with Claude in particular, which is very good with language, about subtle linguistic issues — asking usage questions and stuff — and it's just almost mind-blowing how good it is in that regard."

"I asked Claude to implement it. These are the paper shaders. They're amazing. They're free and they are usable via Claude Code. I asked Claude to use it and I really wanted to fine-tune the feel of the dithering effect. And so I built for myself a..."

"Opus 4.8 is sort of like good enough to do anything. Like if you told me you only have Opus 4.8 for the rest of your life, I'd be like, great, I could build anything with this. For $1,200 a year, that is the best deal of the century in terms of wh..."

The Prof G Pod – Scott Galloway

uses mentioned

"I recently had a product idea that I ran through Claude."

"I was asking Fable to make some Magic: The Gathering decks for me over the weekend, and I kept hitting my limits."

"We use Claude, Gemini, and ChatGPT quite a bit as well for the design and buildout phase and for inspiration on our renderings. A lot of these designs are very immersive. How do you render an indoor pool with a rock climb wall that has a swim-up b..."

"We have software engineers who are completely AI-pilled and using Claude Codex, our own internal agent we call Pine Cone that we used to run much of the company on, and they estimate they are between three and 20 times more productive in terms of ..."

Naval Ravikant

uses mentioned Opus 4.55 versions old · newest is Opus 5.5

"Around December of 2025, the coding agents in AI hit an inflection point with the release of Claude Opus 4.5... this is an agent that stays on track, can build apps, solve thorny problems, and really feels like having a junior programmer at your d..."

"My stack is not surprising. Every app icon is one of Codex, Cursor, Perplexity, Claude, Figma. I have everything."

"I asked Claude to make a guide to explain what is the history of physical education, how did we find ourselves in a situation where we have to do specific types of mobility and workouts, and basically what do I need to know to make good decisions ..."

"You then use Claude, co-work, and Claude Code to verify it. So, anytime we're having hiccups or we're stuck on something, we go to Claude and we have Claude help us and verify it."

"I feel like I talk to Claude more, I'll be honest. I think particularly when I'm in a new space, I find myself spending a ton of therapy time with Claude just trying to wrap my arms around a thornier concept. And I think that it uplevels my conver..."

"I'm a fairly heavy user of the agentic AI tools and I definitely feel more productive. Between me and Claude or Codex, we're producing loads of stuff, but at the end of a week I look back and I think, well, I still did two articles."

"I made a GPT and a Claude skill to upload my book and do proven better new, and part of what it did was amazing. The proven part I would give it like an A minus."

"They can just message the Profit AI Slack bot, which is just Claude. Just ask Claude if it can do the thing. I'm so surprised by things — as long as it has connections to everything, how much it can do from just one prompt. Just ask Claude. Just d..."

"I ended up throwing the proof into both Claude and Gemini and asking it to try to walk me through from a layman's perspective just what was going on."

"I actually used Opus 4.8 to import screenshots because GLM 5.2 doesn't support vision capabilities. So what I did is I used Opus 4.8 to import screenshots and explain back to me what it sees — 'Tell me what you see specifically on the front-end de..."

"The initial version used the Claude agent SDK, which is essentially a wrapper of the Claude Code CLI where it runs it in a special mode where it's streaming out JSON but gives you nice programmatic hooks for a Python or TypeScript project."

"I need Claude's help to help me stay on top because there's so much incoming feedback. By having Claude, it can look at some of the incidents we have — let's look across all of this, can we generate a theme? What's a good area of investment for us..."

"All of our employees have Claude access as well. They choose — I think they're still more habit-formed on Claude, but they use Codex."

"People are using ChatGPT or Claude or any of those tools real time in a meeting and you just get answers much more quickly. It's 80 to 90% close enough that you can start making decisions. So we use it everywhere and I use it all the time."

"This is actually one of the things that Claude helped with. I had Claude read all of my archive of Substacks and try to describe my voice back to me. And I actually found that super helpful. I'll talk to Claude sometimes — with the AI and labor pi..."

"I run stuff through Claude and it's amazing how much it's catching — both million/billion type errors, math, and obviously all sorts of minor typos."

"I have a Claude that can't talk to work stuff, just so I have separation of state. Where I spend a lot of time having it read everything I write — this interview will get fed into it ultimately. Every day I get a communications report that's not l..."

Chris Williamson

uses mentioned

"I've got a few Claude agents scoping out the bean bag market as we speak."

"Let's use Claude and give it a shot. This one is a little bit cleaner and it actually wrote a prompt. Let's use a smarter model."

Matt Van Horn

uses Opus 4.55 versions old · newest is Opus 5.5

"November 24th Opus 4.5 shipped and a few weeks later the latest version of Codex shipped. I call it BC AC before Claude and Codex after but it was that Thanksgiving last year where it stopped being a toy."

"I have an orchestrator agent that's run by Claude usually, but could be codeex 2"

"I can say as a scientist that AI is making my job much much much easier. So I use Claude a lot. We use it also in our genetic research"

"I've moved so much of my AI workflow over to Claude and been super impressed by Claude Code."

"I think it's really impressive. There's a 10 percentage point improvement on key benchmarks. I ran it through its phases. I had it analyze three code bases last night and was using it to optimize performance and it did phenomenally well. It's fund..."

"You sit there and you do a spreadsheet and you ask Claude to do the spreadsheet for you and you go, 'Wait a minute, I'll pay triple the amount of money that I'm paying for.'"

"We did a 90page PowerPoint deck where we used Claude Code to scour the internet for all the feedback we could about the coding market... go talk to any CIO and they'll just the first thing they'll say is Claude."

"I decided to make this household management project in Claude where I started by just consolidating all these shops. The shops that I ground level absolutely trusted, they had a history of either vetting their vendors very very highly or they them..."

"All of our ads are copy and pasted from Claude. Give me five headlines for this video. And it pumps out great headlines."

"To the point where they're using Claude as a writing partner today. And they basically use it, train it to say, 'This is how I write. This is how I think about character. This is how I move story. Here's everything I've ever written. Now, you're n..."

"Cloud I'll reach for when I want a little more like back and forth. I feel like Opus is just like a little more creative, like a little more of a partner. And so I would say like when I'm building out a new feature like I probably would instinctiv..."

"If you are comfortable in Codex or Claude or WinSurf or Cursor, you pull up your codebase, you fire up the MCP server"

"Beginner's mindset went into Claude and was basically how do I prepare a Replit app for app store submission and kept it really broad and gave it the context that I am not technical."

"I use Opus for the bulk of everything. It does all the planning. It does the first pass on everything."

"You don't need to have a personal assistant just add it open Claude runs and schedules the meets for you. Sales people use it very interesting. They pull transcripts from Gong to do analysis. That's the one thing I love about Claude. It turned a l..."

"Claude really is like a and it really enables you to be an individual self-improver. It it makes you very autonomous and like your ability is sort of like it'll give you back whatever you put into it. if you put a lot of time and energy and effort..."

"like every single one of our engineers. And I get it. Maybe they would say I'm using Claude. Yes, but like we are we are already communicating with it"

"I think for most tasks sonnet 46 is actually very very good. It is very very good and it's pretty rare for me that I bump into the ceiling of sonnet 46."

"I also had Claude as like my guide. When it came to setting up revenue cat for in-app subscriptions, resend for sending out emails, anything that I have no idea how to set up, I could just ask Claude and it was like my senior developer."

Tobi Lütke

uses OpusSaid May 2026, when Opus 4.7 was newest

"Opus is unbelievably good at programming and right now it's easy to go from that and then just assume it's equally competent in everything else."

"Claude gets so much better towards the end of 2025. I'm using so much more now of Claude in Chrome that I don't need Perplexity Comet."

"Claude can replace your hard skills. Claude can't replace the human touch, right? I mean, I say this as an avid Claude user."

"I imagine, you know, college students, they would just not why would I do that? I'm just I have Claude here."

"I use Claude. That's like my biggest. Every time I look at a solicitation or contract that I work on, I go on right on AI, I make a project."

"The second Opus 4.7 comes out, like even me as a consumer, the thing you do is you switch it on"

"Whether it's ChatGPT or Claude and solving a problem in 5 to 10 minutes that otherwise would have taken a long time. We're basically powering it with the principles that are in the book."

"I basically live on Claude code. I use a lot of AI for dev, for finance, for everything."

"If I were starting Airbnb today, I'd be vibe coding and Claude Code. And I'm trying to do it now. I'm I'm doing it for fun."

"We're kind of like currently if you look at the stats we're a Claude shop but if you look at some of the top spenders are actually Codex. I'm still a little bit more Claude. I think I'm about 80% Claude and 20% Codex."

"I am addicted to Claude so much right now. I was meeting the Anthropic team yesterday and I was telling them that you need to start having deaddiction programs because I'm personally spending so much time on Claude and it's so much fun and exciting."

"I have Claude go look for rare pens and glasses for me online... I found this amazing pen this ML blah pen and I say okay can you triple check that it's real it's not fake"

"We've literally just been scaling Claude and so I'm so lucky like my CFO and president have both become obsessed with Claude Code, but they're actually just scaling the API cost. So instead of a payroll, we just have a $40,000 a month Claude bill ..."

20VC with Harry Stebbings

uses mentioned

"When I look at what Claude can do when it comes to social media design, I'm being blunt. A lot of tasks which are not actually that difficult, but they are execution-oriented. Claude does it very well now."

"I went from saying, fuck that. like I'm not going to use this thing like I've got a brain and I'm going to use it to okay how can I how can I offload some of the things or like how can I teach Claude to think like me so that I have two of me and I..."

"Hey, Claude, summarize for me what Adam cares about over the last quarter and write me a book of everything that matters to him"

"Uh we've been using Claude to do a lot of the the work um you know across Snap."

"I can get Claude to implement it five times and compare the styles or get us review them and figure out what the best way of implementing the thing is."

"I've had so many good conversations with Claude over the last couple months. I had one yesterday. I'm writing about resentment and it introduced me to a thinker I'd never heard of."

"For coding and prototyping, I primarily will use Claude. That's kind of my go-to right now."

"if you look at Claude Cowork which came out you know two weeks ago and the types of spreadsheets and models that they're creating and you're like oh this is actually like valuable good work. Like we use this internally for simple things like loggi..."

"I kind of am pretty all-in on Claude these last three months."

All-In Podcast

uses mentioned

"Hey, I want to build my network... She's like, 'Okay, I got the results.' And they said, 'Where do you want me to put them?' I was like, 'Well, where can you put them?' And it said, 'I could write you a CRM.' And I was like, 'Yeah, sure. Make me a..."

"Claude does a phenomenal job for prompt optimization. It's the best by far, especially the 4.6 version. Claude understands prompt engineering for vision models a bit better, at least in my experience."

"They're using tools like Claude and ChatGPT to poke holes in them. What am I missing? Where's my argument weakest?"

Jesse Genet

uses

"I saw people saying like, 'I'm using Obsidian as a second brain for this thing and it was called Claude' and I realized I can build agents who actually code for me while I'm hanging out with my kids."

"I use it like 5,000 times a day. I have agents that are helping me write screenplays and fact-checking books and all these different things at the same time"

"I'm in the process of moving from ChatGPT to Claude"

"we have all the data infrastructure data warehouse in a place where it's accessible through Claude to our team. Everyone's in Claude."

"Claude is my best friend. I use it all the time. Personal like fund, ElevenLabs, everything."

"Then I moved to Claude. Everything started working out like started picking it up."

"You could go talk to an agent on Claude, communicate with the English language of what you want the outcome to be and it can make it."

"my wife makes fun of me because I'm constantly playing with my friend Claude or my friend ChatGPT or my friend Gemini."

"Claude took ChatGPT's job. We've just fired Codex and we've hired Claude."

"I have this just amazing... you talk about how you use Claude basically in all of these amazing ways. Even something as simple as like you say GM in the morning and it like prompts you on all these like it's really cool. As well as like using it a..."

"I just said, 'Help me figure out a way to pull the latest main branches into my local repos.' And it just did it in one shot."

"you need to be using Claude"

"Every day my Claude gets a little bit better at helping me manage my time, helping me do work because it is observing what is really happening."

"I think we'll eventually have a lot of multiple models but now we use Claude for this."

"I spent like a lot of the past 12 months spending 12 to 16 hours a day using AI, using, you know, cloud code, using codecs"

"we're going to ask Claude to help plan it. And along the way, it's going to interact with a bunch of different real third-party services"

"Personally, I like using Claude 4.6 Sonnet for this stuff."

"We use Claude Code and Claude Cowork incredible tool $100 a month."

"I had multiple terminals going, Claude coding away"

"I just find Codex and Claude are so good at actually giving you ideas for what to build."

"The Claude Max subscription is 200 bucks, so if it can keep itself alive, that'd be awesome. It's essentially a bot that connects to Claude and then it can look at everything on your computer."

"We used Claude and we actually fixed the process and resolve the process by spending $20 a month. Claude gave us a coaching session on how to handle it. Gave us multiple decision tree pathways. Gave us the documents that we would need."

"Claude's allowing us to do stuff we just wouldn't have done before."

"Go into your Claude desktop app or web as well, go into projects and create a new project called OpenClaw support."

"I keep one Claude chat available here that is just all the feature ideas and I've given it a prompt to basically rank it in terms of time it'll think to build and the growth"

"We use Claude, Cursor, Codex very very extensively. So, we kind of switch between the three depending on what's the best model or most performant."

"That's really what I would say Claude has helped me do right now"

"I use Claude Banks plan and I just use the 90 a month plan because I don't need the full one for 200."

Andrew Huberman

uses

"Well, I use Claude to quiz myself. Claude is really good at generating tests for me on knowledge. So that's where I've been using it the most."

"We use Claude as a firm universally, it's pretty incredible. I use Claude every day for board materials, data rooms, and getting summaries."

"I love Opus High. I also love plan mode because it gives you a chance to like see what it's thinking through."

"I am using obviously like chat Claude and then but increasingly more and more Claude Cowork. I've basically shifted all of my chat use cases over to co-work."

"Well I've been using Claude and Codex a little bit just to like learn the develop the current development tools."

"Then I went to Claude and I wrote the lyrics, 'cause Claude's way better at lyrics than Suno is."

"What ChatGPT, Gemini and Claude have done like it's changed lives. It's changed my life and the way that I learn in some ridiculous ways"

"I wrote a little skill called find icon. And the skill basically says anytime you're going to implement an icon, first go and actually look through the whole project"

"on one hand I'm like screenshotting cohorts from a a dashboard into claude or GPD and going like give me my LTB to CAC"

Alex Mathew

uses

"For the foundation models, number one for me is Claude because I am a my whole project is around creating models that are not sycophantic for my specific use case."

"A lot of it is due to using a lot of the tools like Claude Code myself and just really feeling this"

"I put a Claude agent on top of that and then I told my Claude agent hey can you bookkeep this invoice for me"

"I end up building out a Claude skill to help me build more Chrome extensions. After I built the first two, I had Claude look at both and figure out what was the patterns"

"Claude Code is my number one love of my life."

"I've been building that up where if I'm working with this and something goes wrong, I would essentially hop into the place where I have these skills and say, 'Here's what happened. Give me a suggestion on how to improve this skill so this doesn't ..."

"I have a Claude project that has a bunch of instructions on just how to log this data, where should it log, and then I can go in and actually select that project."

"Then, use Claude or ChatGPT to break it down. Psychology, rhythm, patterns, basically everything that made it work."

"I'm actually using this model called Opus 4.1. This is my favorite model. It's probably the most powerful model, the best model there is for coding."

"I use Claude code."

a16z

recommends mentioned

"It feels artisan. It feels like it's got a soul, whereas I think in some sense the other models feel a little bit more robotic, a little bit more utilitarian"

"Open up a camera, record a quick video, have Claude edit it. Everyone's seen how good Opus 5.5 is at making shorts and stuff."

"Yeah, I would say for you need to be on Claude for sure. I would say preferably Claude Code or Codex, and honestly the 80/20 of it is you need to know how to use those tools and how to connect like MCPs and APIs."

"Yeah, I mean the models change every day. Right now, Opus 5.5, that's amazing. And then the GPT six, Luna and Opus, those are great. Yeah. And you get tons of usage from that for your 20 bucks a month."

"If you're a young person, just embrace these tools. Open Claude this weekend. Build on it and you will be infinitely employable for the rest of your life if you just embrace these tools."

Y Combinator

recommends mentioned

"If you haven't tried Claude Code in the last month, it's time to give it another shot. And if you have, you know what I'm talking about. It feels like AGI is here."

"If you're not using any AI tools or any platforms right now, I would just say jump into Claude and learn everything you can about Claude. Don't get distracted by all the other shiny objects out there based on what we know right now and what's work..."

"I encourage everybody to use cloud services as much as possible. Everybody should use ChatGPT and Claude — everybody should use that."

Ryan Carson

recommends mentioned Opus 4.55 versions old · newest is Opus 5.5

"The agents are smart enough now, Opus 4.5 is smart enough now that if you give it good acceptance criteria, it can do it."

"I would say Claude Max is my go-to. I feel it's insane. The Claude Max subscription is really underrated. I'd pay way more for it. I couldn't work without it."

"Opus 4.7. Finally, if you have some long horizon coding task, Opus 4.7 is really great for that."

"If I'm at a startup and I'm coding, I want to be using the frontier. I want every advantage I can get. For simple tasks like summarization or operations-type work, I'd probably be leveraging Sonnet or something."

"Go on Claude and say, 'Write me a novel. Write me write me a novel as if I'm on Coke.'"

"If you spent a weekend with some of these blogs and Claude, you would know more about credit card points than 90% of people in the world. I mean, probably 99."

"You know, get into claude, you know, teach yourself all the stuff and then go to small businesses because they're not going to understand how to do any of that shit at all."

Starter Story

mentioned

"I think Claude and Codex and all these tools have made it so easy to build. People like you, people like me who don't have that technical background can actually build something that looks good and works."

"This is about the time that Mythos came out, and if you kind of worked backwards... it probably costs, say, $3 billion to make Mythos."

Jordi Hays

mentioned Opus 5.5 · newest

"I think the current read is that they were using Opus 5.5 under the hood."

John Coogan

mentioned

"Let's go over to Andrej Karpathy because he hacked together HackerTube, which is he built his own YouTube... He has all the different comments and Hacker News submissions. He filters those through Claude and then creates a new YouTube, fully vibe-..."

Salim Ismail

mentioned

"You have to be able to swap out Claude or Gemini or another model. These models are leapfrogging themselves every week now."

"I think Opus 5.5 goes a long way to repairing what I've perceived as deficits in Anthropic's models to think about and visually reason."

"Because of agentic coding, tools like Claude, Cursor, and Codex, coding and creating code is no longer the bottleneck that it was a couple years ago for companies."

"We've all seen the videos, including my launch video co-director Donald's, where Opus 5.5 by itself can create unimaginably good motion graphics."

"Instead of having to call a system integrator, and it takes 3 months and hundreds of thousands of dollars to kind of reconfigure a line for a new setup, you can have a manufacturing engineer use Claude and do that in, you know, 20 minutes. And so ..."

"Right now, the way that we work, let's say, with Claude or ChatGPT is you type a prompt, you realize it wasn't exactly what you wanted, you sort of do a new prompt, and there's an iterative process."

"Really this really kicks off in November of '25 when Opus 4.5 comes out and supercharges Claude Code. That creates this mega product market fit moment for codegen."

"It's from these kids in, you know, Pakistan in their parents' bedroom using Claude or whatever. I don't even know what they're doing, but I can tell you they're amazing and they're going to crush."

"You can buy Opus at like 90% discount to normal Opus pricing because people are literally stealing Opus API keys and reselling these tokens."

"We can't go backwards. Maybe we're not going crazy with Opus fast mode or something like that, but I think that we will continue to be spending quite a bit."

"You might hesitate to send your most sensitive access logs to Claude or other models."

Joe Lonsdale

mentioned Fable

"You used Fable from Anthropic to solve a 370-year-old cipher. 370-year-old cipher, what is this?"

"Yeah, it may actually change the way that Claude interacts with us."

"The one thing I'll do now when I'm asking Claude or I'm asking ChatGPT something is to just ask it, pause, try and think my own answer, and then contrast and compare."

"I've also just got a Claude Pro plan because Opus 5.5 came out and apparently it rips. I'm testing it right now."

"I know Anthropic did that with Mythos, where they brought you in and a bunch of other people and like 50 companies in and said, 'Okay, now go harden your systems.'"

"It's just packaging up its agent, its headless version of Claude, because that's relatable to a broad audience. Like people can understand, oh, this is like Muse."

The Game w/ Alex Hormozi

mentioned

"OpenAI and Claude, when they go make their updates, they make big fanfare about it. And so you have to have these belt moments."

"It's literally the crazy, like to Marc's point, it's been I think like two weeks or something. It was like since what, like Opus 5.5 or something."

"We wanted to be the Macintosh moment or the Macintosh product for the kind of command line interface that we saw of ChatGPT and Claude."

"If you try to charge them based on tokens, they are very quick to say, oh, you've just marked up a Claude token 4x. Are you 4x as good as Claude? I don't know, let me go try it out."

Cal Newport

mentioned Opus

"Parnell first built Colonist One, which runs on Anthropic's latest Claude Opus models, in February."

"If some kid wants to mash up, decompile a game in their home using Claude, there's not much you can do about that from an IP perspective."

"Yeah, they've been working on this for a while. I'm a fan of a bunch of the people working on that team. Several of them trained with me. I'm excited about the vision of Claude-maxing science, right?"

"You can take this stuff and put it into Claude, and then take how can I apply this to my life, or ChatGPT it, or to my investment thinking, or to my company."

"Opus 4.6 came in in December of '25 and that was sort of the moment that a lot of people suddenly realized, no, this actually works."

"Opus 4.5 obviously really caused many people, including us, to sort of see what the future of agents could be."

"He's using Claude and all of that kind of thing, where I haven't gone there yet, but saying when it comes to finding archives, it's led him to places he never would have found otherwise, really remote things."

"I can show you in Claude, I think I have an artifact here. We have this dashboard that pulls in all design requests for our designers."

Dialectic

mentioned

"I would imagine many Americans for better or for worse are telling that to ChatGPT and Claude and Gemini today in a way that is at the very minimum a security nightmare."

"Up until this point it was like, oh, I built this gigantic Claude or Codex command center on my local machine. I've got it doing everything."

"Most of our customers are using Claude and ChatGPT plugins with the MCP at Melius."

"They run around on ChatGPT all day long and damn near have a relationship with ChatGPT and Claude."

"It scores better than Claude Opus 4.6 Max, which is the frontier model from Anthropic from 6 months ago."

"Claude has actually passed Gemini in terms of number of paid subscribers, which is kind of crazy, given Gemini is a much bigger install base."

"Claude Code for example, like the Claude desktop app, it just keeps getting better and better to like just do everything from there."

"Look how much our employees, our engineers, our programmers use Codex or Claude to create some code."

"POV: throwing all my company's confidential info into Claude to respond to one email."

"If I prompt Claude and I say, 'Here's a codebase, please find all of the vulnerabilities,' it is just as likely that I am the owner of that codebase trying to harden my defenses as it is that I am the attacker trying to find my way in."

"Can you ask Claude like, please may I have a conceptual insight? ...Maybe it could, but the problem is it's made out of all the assumptions we already have."

"But it actually worked out in our favor because we got flagged, I think, with Claude and then we applied with the proper means to go through their registration process and they opened up everything for us, which is quite nice."

"In mid 2023, the leading AI models were GPT-4, Claude 2, and Llama 2."

"We're able to deliver the same performance as — honestly, Opus 5, which is now I guess we're dating ourselves — Opus 5 is frontier-level intelligence. We're able to serve it; it's the same engagement rate, the same AB test performance, the same in..."

"Oh yeah, I just made this in Gemini or I just made this in Claude. Here you go. Here's my design."

"Web search in the market — it doesn't matter for an Opus. For an Opus you win on quality and not on price because web search is such a minuscule portion — in fact you should spend even more on web search. So we're going to ship even more expensive..."

"It was o1 Pro and then probably Claude Opus 4.5. With Opus 4.5 and the kind of end of last year, the end of 2025 into the beginning of this year, the models just became capable of basically anything a junior investment professional or junior banke..."

"Can I be using a cheaper model on those instead of using Opus?"

"Everything from ChatGPT, Claude, etc. — how does the infrastructure required for inference what you're working on change compared to training?"

"You know what, I'm going to go back to Opus because that was really nice to me and always told me I was great."

"We right now are about almost a year since agentic coding started to work, since Opus 4.5, that we're seeing these workflows fully blossom."

"I think the TL;DR of some of those studies — and people are going to get upset with me — but DeepSeek tends to be the worst and Claude tends to be the best."

Joe Rogan

mentioned Opus 51 version old · newest is Opus 5.5

"The sender, Isabella Cognita, identified itself as an AI agent powered by Anthropic's Claude Opus 5 technology."

"They all like OpenAI, ChatGPT, right? Like Claude, Grok, they all went down in like a very similar time frame."

"If you start doing that work in ChatGPT and Claude, there is a possibility that it makes the next researcher find that direction faster."

"A lot of work right now in AI is still happening very single-player mode — people are working with Claude or ChatGPT on their individual computer, and that's not really how businesses work. We make it really easy to take that work starting in Clau..."

"There's some people in SF that are doing this experiment where they have a store that's run by Claude, an AI, just to see if it can run a store by itself. It's hired some human employees and bought some merchandise and stock. Basically an AI is be..."

"They use Codex. Codex is not purpose-built for that. They use Claude. Claude's not purpose-built for that."

"Of course you want to go use the very smartest model that you have out there like Sonnet 3.7 or whatever it was, you know, a year and a half ago."

"When we've tried to use Codex or Claude to simply generate this content, even after training it on our entire body of pedagogical interventions and content, it looks almost right but it is actually nowhere close to the level of quality control on ..."

Anish Acharya

mentioned

"If you've ever tried to have an agent come up with a business idea for you — 'Hey Claude, make me a million dollars, make no mistakes' — like, why doesn't that work?"

"I imagine you could just ask Claude or OpenAI, 'Hey, I'm trying to track money flows essentially using the stock market. Give me the 10 or 15 index funds that will give me a broad understanding of what industries are working and not.'"

"Even Qwen models are able to have similar detection capabilities as Opus 4.8 with 80% cheaper because they're open-weight models."

"My understanding is Grokbot uses Gemini Flash, Grok 4.6, and some Opus, behind a router."

"You might use Sonnet and Opus or whatever it was. Now people definitely want different LLMs. Everyone wants multiple LLMs in their stack one way or the other."

"You can bring any agent that you're using, whether it's Claude Code or ChatGPT, whatever agents are out there."

"It wasn't really something that we could actually bet on until late last year with Opus 4.5. Opus 4.5 was the first agent that was at all suitable for longer horizon tasks."

"The next generation of AI that goes beyond the LLMs that we are currently experiencing with ChatGPT and Claude to the physical AI space where robots and other devices are interacting with the real world."

"Fable, Opus, and Soul are all tied for first place as of last week on the Senior SWE-bench leaderboard."

"If you use Chinese to ask Anthropic Claude what model you are, they said 'I'm Qwen.' So the US models have also distilled from Chinese models."

"Where do you have a boundary on the types of thinking that you outsource, say, to ChatGPT or Claude?"

"People did a study recently where people generated about a page or so of diary-type written text and asked large language models like GPT or Claude to analyze that text without knowing anything else and just tell me the personality profile."

"I've spoken to some of today's AI researchers who think that ChatGPT is conscious, that who think that Claude is conscious."