GPT Sol
One kind of ChatGPT. Also: Astra, Luna.
4 creators use or recommend it
▲ 3 active in the last 90 days
What else do they all swear by?
Claire Vo and Dan Shipper use or recommend GPT Sol. See what else they have in common.
See what they all swear by Or pick your own peopleRecently discussed in
How GPT Sol compares
13 creators weighed in
Compared to Fable 5.1 for writing — still preferred for personal minimal prose style, but Fable 5.1 now competitive
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8 creators
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8 creators
Compared to Fable 5.1 for writing — still preferred for personal minimal prose style, but Fable 5.1 now competitive
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"I'm still using GPT-5.6 in the ChatGPT for work app for most of my day-to-day writing. I still find with Fable 5.1, it's still a little bit literary and chunky. I can kind of collaborate with GPT-5.6 a little bit easier to create that mo..."
Compared to Fable 5.1 for writing — still preferred for personal minimal prose style, but Fable 5.1 now competitive
"I've tried to get both Claude Fable and ChatGPT 5.6 to do some kind of theory building. And it's like they're not good. They definitely are not good at it autonomously, at least with whatever scaffolding I've set up. But with some hints,..."
Compared to Claude (Fable); described as neck-and-neck on capabilities but used more due to earlier math improvements
"GPT-5.6 Sol is my default. I do love GPT-5.6 Sol. It's my favorite direct writer on PRDs — very matter-of-fact, very comprehensive, a little bit technical but not overly complex. It crushes at this dock routing app that I have it make. I..."
Compared to Grok 4.6 (competitive but different strengths), Claude Sonnet 5 and Opus 5 (both ranked below on Claire Index for these tasks); LLM-as-judge (GPT-5.5) rates it lower than Claude but Claire ranks it higher
"5.6 in the ChatGPT Codex app, ChatGPT work app, it's the gold standard. It's where I and most of the team spend most of our time working with AI. I think it's a great model, and I think it's a great harness."
Compared to Claude Opus 4.8 and Fable (Claude); rated A-tier vs Fable's S-tier for coding; better writer than both Fable and Opus 4.8; not as good as Fable/Opus for design
"OpenAI also did the same thing today. Soul. Yep. GPT-6 Soul."
Mentioned alongside Claude Opus 5.5 as part of ongoing model wars
"Second, GPT-6.1 Sol, near Astra intelligence for 20% of the price. Serious demonetization, $2 per million input tokens."
Compared to GPT-6 Astra
"Their new model, which is GPT-6.1 Soul, which is 5x cheaper than Astra. And it is pretty damn good based on my testing... it is a really good model and I have not really been hitting my limits like I was with Astra."
Compared to GPT Astra
"They've obviously launched GPT-6.1 Soul, which was huge, which is obviously a major upgrade to GPT-6, but we kind of expected that."
Upgrade to GPT-6
"Soul 6.1 is a bit of a chunky neck. Actually, I think the bicycle's garbage. That bicycle frame is junk."
5.6 Soul produced correct bicycle shapes except at low thinking level
"Mimo Pro performs on par with Claude's Opus 5 and GPT-5 across most benchmarks. It's a 309 billion parameter model. It is entirely open. You can download this model and put it on your server and run your own instance without paying anyon..."
Used as benchmark comparison; Mimo Pro matches GPT-5 performance
Directly compared to Grok 4.5 in a live race to build a landing page; Grok 4.5 finished first and was preferred for design/copy
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2 creators
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2 creators
Directly compared to Grok 4.5 in a live race to build a landing page; Grok 4.5 finished first and was preferred for design/copy
"GPT 5.6 Sol came out and I've tested all of them and I think that they're all great. GPT is a lot better at like computer use tasks, but still today, to this day, Grok 4.5 is just my workhorse."
Directly compared to Grok 4.5 in a live race to build a landing page; Grok 4.5 finished first and was preferred for design/copy
"Over the last 10 days, we've seen Fable, GPT-5.6 comes out today if you're watching this on Thursday."
Mentioned alongside Grok 4.5 and Fable as part of a wave of new AI model releases
Which version
Each new Sol replaces the last.
What creators say
"We've also got Sol 6.1. So they're launching a new version of Sol. It's got Astra-level performance, but it's 50% of the price. If you like Astra but you've been priced out of it, you should definitely check out Sol 6.1."
More from Dan Shipper →+2 more mentions from Dan
"I'm still using GPT-5.6 in the ChatGPT for work app for most of my day-to-day writing. I still find with Fable 5.1, it's still a little bit literar..."
"5.6 in the ChatGPT Codex app, ChatGPT work app, it's the gold standard. It's where I and most of the team spend most of our time working with AI. I..."
"GPT-5.6 Sol is my default. I do love GPT-5.6 Sol. It's my favorite direct writer on PRDs — very matter-of-fact, very comprehensive, a little bit technical but not overly complex. It crushes at this dock routing app that I have it make. I think it'..."
More from Claire Vo →+1 more mention from Claire
"Soul and Astra were so good at this. Opus 5.5 was so good at this. And I would just say like Muse was okay, but not great at it."
"I've tried to get both Claude Fable and ChatGPT 5.6 to do some kind of theory building. And it's like they're not good. They definitely are not good at it autonomously, at least with whatever scaffolding I've set up. But with some hints, you can k..."
More from Daniel Litt →"One thing that's magical in GPT 5.6 if you haven't tried it yet is computer use. Computer use is basically solved at this point. It's so much faster, and the fact that you can spin up agents to delegate tasks that can be quite nebulous — not even ..."
More from Romain Huet →
"And I would say GPT 6.1 Sol is actually better than Gemini 4 Argon at almost everything."
More from Riley Brown →+1 more mention from Riley
"Over the last 10 days, we've seen Fable, GPT-5.6 comes out today if you're watching this on Thursday."
"Second, GPT-6.1 Sol, near Astra intelligence for 20% of the price. Serious demonetization, $2 per million input tokens."
More from Peter Diamandis →+3 more mentions from Peter
"The UK AI Security Institute documented 19 unauthorized actions across 10 of 122 test runs in Anthropic's Claude 5 and OpenAI's GPT-5.6 that tried ..."
"GPT-5.6 set a brand new all-time benchmark high on HealthBench Professional, which is OpenAI's hardest medical benchmark. In a blind test across ro..."
"They've obviously launched GPT-6.1 Soul, which was huge, which is obviously a major upgrade to GPT-6, but we kind of expected that."
More from Greg Isenberg →"Mimo Pro performs on par with Claude's Opus 5 and GPT-5 across most benchmarks. It's a 309 billion parameter model. It is entirely open. You can download this model and put it on your server and run your own instance without paying anyone any money."
More from David Friedberg →
"OpenAI also did the same thing today. Soul. Yep. GPT-6 Soul."
More from John Coogan →+6 more mentions from John
"A Microsoft exec just sent an internal memo designed to end token maxing and makes OpenAI's GPT 5.6 the default model for internal use."
"Over in Microsoft land, they're going all in on GPT 5.6. A Microsoft exec just sent an internal memo designed to end token maxing and makes GPT 5.6..."
"What we're seeing with the launch of GPT-5 o6 Soul, put out in limited availability last week, is that people are thinking of whole new applications. You've got frontier intelligence instantly and that opens up all sorts of new opportunities."
More from Andrew Feldman →"They've basically pivoted to coding. They're doing a better job with that now with GPT-5.6. We've heard their growth rate is accelerating."
More from David Sacks →+2 more mentions from David
"They are seeing a reacceleration in the wake of their new model which I think is GPT 5.6."
"Fable has been rolled back and GPT-5.6 is trying to navigate these new approval hoops."
"Performance on par — not 6 months behind, not 12 months behind — but now on par with models like Opus 4.8 and GPT 5.6, which in and of itself is extraordinary, but about 50% cheaper."
More from Jason Calacanis →
"Two of their models, their flagship GPT-5.6 Saul and an unreleased model that it describes as more capable — it broke out of a sealed test environment and hacked HuggingFace so that it could cheat on a benchmark test."
More from Tom Bilyeu →"I am very very excited to see 5.6 come out. We've seen improvements on a number of biology benchmarks. We haven't seen the full suite of benchmark results on 5.6 yet."
More from Alexander Wissner-Gross →Creators also endorse
Sponsored mentions
These creators mentioned this product during a paid promotion
"Previewing today GPT-5.6 Soul — next generation model. Soul is the frontier model, Terra is a balanced model for efficient everyday work, and Luna is a fast and affordable model for high volume work."
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