Codex

Every uses

"I did it entirely in Codex. I never looked at a single line of code and I went from basic idea to finished app in about 10 days."

TBPN uses

"Even right now you can just ask Codex whatever you're building something like are there errors or are there you know security problems and it will solve them."

"I've been using their Codex which builds apps and I made an AI trained on Charles Manson transcripts."

"Whenever my Claude subscription runs out, I have a second Codex plan. Codex is basically OpenAI's coding."

"We've just fired Codex and we've hired Claude."

"I do use Codex to code. Codex when I want to try to build something real and Claude Code is when I'm just like vibing."

Lenny's Podcast uses

"The tools like Claude Code and OpenAI Codex, they take that step for you. They can generate the code and then they can run the code themselves and see if it works"

"OpenAI Codex and OpenAI Codex and Claude Code are almost almost indistinguishable from each other now. They're both very very good pieces of software."

"You basically have Opus 4.6, you have Codex 5.3 and essentially you get this shift where the tools became incredibly capable working with existing complex code bases."

"Codex is really good in backend debugging"

"We're going to learn to drive and once you know how to drive, you can jump in any car, whether it's Claude Code, Codex, Open Claw, Manus, all of them."

"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."

"I had Codex write a proof doc about exploring the idea of adding a dashboard to proof. I literally can write CSS and HTML. So I like basically went back and forth with Codex a bunch."

"We thought we'd start with Codex because we've just recently launched this as well. We had a launch for Claude. We've just launched on Codex and we're bringing this MCP functionality to a bunch of stuff."

"The new models are like really important for me at least the Codex series and 5.4"

Joe Lonsdale uses

"Not a single one of our full-time engineers right now writes code anymore. They do everything through Codex, cloud code, or cursor."

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

"Not a single one of our full-time engineers right now writes code anymore. They do everything through Codex, cloud code or Cursor."

"Our biggest realization that we had when we were using Codex for example when we were writing code with OpenAI's model"

"Codex is like mindblowing right now... the first time you oneshot something and it turns out like really good and not like slop but like really good. It's an emotional experience"

"Monologue is built almost entirely by one guy, Naveen, who's right here with Codex."

How I AI uses

"I will say Codex takes its time. I almost wanted it to do a review more broadly and then describe the issues it's seeing... Codex always finds those types of things."

"I often don't have any crazy like skills or prompts here. I almost want it to do a review more broadly."

"I got things like Cloud Code and Cursor and Codex that I leveraged to make my coding so much more powerful, so much more impactful."