Sam Altman(@sama)

The back of the Navier-Stokes milestone shirt is the last line of the chain-of-thought from the solu...

Sam Altman (@sama) — Fri, 16 Oct 2026 16:56:29 GMT

The back of the Navier-Stokes milestone shirt is the last line of the chain-of-thought from the solution:

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Wow the new roadster looks quite amazing, good job @elonmusk

Sam Altman (@sama) — Fri, 16 Oct 2026 16:26:29 GMT

Wow the new roadster looks quite amazing, good job @elonmusk

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Very happy to see this from Nick!

Sam Altman (@sama) — Fri, 16 Oct 2026 16:22:07 GMT

Very happy to see this from Nick!

Nick@nickcammarata

interpretability might be the most important scientific problem in the world right now, as I don't think we can solve alignment if we don't know what we're building. I think I have good news about it. I co-authored early work in mechanistic interpretability at OpenAI and came away pessimistic, because neural networks appeared to fold into arbitrary tangled knots. years later, I started openai's first large-scale automated interpretability project, finding about 2% of neurons legible with the primitive tools we had

with modern agentic tools and a much closer look, the picture looks totally different. the vast majority in models up to trillions of parameters are legible, and their circuits beautiful. many famous examples of tangled neurons turned out to be misunderstood. The roadblocks I expected mostly aren't there. I now think ambitious interpretability will be solved by the time we need it most, and possibly quite soon, as automated scientists keep improving. it may be a bitter lesson for interpretability: the simple thing, at absurd scale, works

already-clean.goodfire.com

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Have been waiting for this one for a long time, and I would hate to have to go back to the old versi...

Sam Altman (@sama) — Wed, 07 Oct 2026 20:03:01 GMT

Have been waiting for this one for a long time, and I would hate to have to go back to the old version of Chat!

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ChatGPT can now generate a custom UI for you!

Sam Altman (@sama) — Wed, 07 Oct 2026 20:01:57 GMT

ChatGPT can now generate a custom UI for you!

OpenAI@OpenAI

GPT-6 and Intelligent UI, now rolling out in ChatGPT for everyone.

Intelligent UI in ChatGPT delivers fast, interactive answers that make everyday questions more visual, complex topics easier to grasp, and interactive tools for your task available on the spot.

Your browser does not support the video tag.

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and thank you to the untold number of people who put in the technical work, brick by brick over the ...

Sam Altman (@sama) — Wed, 07 Oct 2026 04:36:45 GMT

and thank you to the untold number of people who put in the technical work, brick by brick over the generations, to get us to the point where such a wonder is possible.

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thank you to the machines, and the structure of reality, for letting us understand a little more.

Sam Altman (@sama) — Wed, 07 Oct 2026 04:35:30 GMT

thank you to the machines, and the structure of reality, for letting us understand a little more.

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looking up at the stars with extra awe tonight. "thy sea is so great and my boat is so small."

Sam Altman (@sama) — Wed, 07 Oct 2026 04:35:30 GMT

looking up at the stars with extra awe tonight.

"thy sea is so great and my boat is so small."

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We are entering a new era of discovery now: https://t.co/Ng8GquwN3r

Sam Altman (@sama) — Wed, 07 Oct 2026 00:06:41 GMT

We are entering a new era of discovery now:

openai.com/index/sharing-…

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I am very uncomfortable about people trying to ascribe religious force or a surrender of human judgm...

Sam Altman (@sama) — Sat, 03 Oct 2026 14:18:17 GMT

I am very uncomfortable about people trying to ascribe religious force or a surrender of human judgment to AI models, and think it is a real safety issue.

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The contrast between hanging up the last phone call of the day of high-stakes decisions and then a m...

Sam Altman (@sama) — Sat, 03 Oct 2026 01:09:24 GMT

The contrast between hanging up the last phone call of the day of high-stakes decisions and then a minute later walking in the door to the pure love of small children who want to laugh and play and show you every discovery they made that day is the strangest and best thing I have ever experienced in life.

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There is some speculation about our partnership with Cerebras. Cerebras is a close partner, and we ...

Sam Altman (@sama) — Fri, 02 Oct 2026 22:19:53 GMT

There is some speculation about our partnership with Cerebras.

Cerebras is a close partner, and we have a deep engagement pushing on the frontiers of speed.

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dot is my favorite openai product so far! it is amazing to me that each day it feels noticably bett...

Sam Altman (@sama) — Fri, 02 Oct 2026 18:16:43 GMT

dot is my favorite openai product so far!

it is amazing to me that each day it feels noticably better as it learns more of my workflow and style.

having it do the stuff i don't like doing--and usually just builds up as a gravity well of dread--has me very happy.

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You should be able to use your AI subscription wherever you need:

Sam Altman (@sama) — Thu, 01 Oct 2026 19:18:18 GMT

You should be able to use your AI subscription wherever you need:

Vignesh@vigyso

I am going to try and answer a bunch of questions that people have raised about Sign in with ChatGPT in the next couple of days. Before that, I want to let you all in to why we shipped Sign in with ChatGPT (SIWC) in the first place. Clarify our intentions here before getting to the specifics.

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Also, 6.1 Sol was our fastest-growing model ever, and was a bit slow under load. Should be much bett...

Sam Altman (@sama) — Thu, 01 Oct 2026 15:56:40 GMT

Also, 6.1 Sol was our fastest-growing model ever, and was a bit slow under load. Should be much better now!

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I think there is much more potential energy in Sign In With ChatGPT/Plugin Extensions than we realiz...

Sam Altman (@sama) — Thu, 01 Oct 2026 15:54:57 GMT

I think there is much more potential energy in Sign In With ChatGPT/Plugin Extensions than we realize

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DevDay was really fun, the builder energy was crazy Still wild to me to see people making whole sta...

Sam Altman (@sama) — Thu, 01 Oct 2026 15:54:01 GMT

DevDay was really fun, the builder energy was crazy

Still wild to me to see people making whole startups in a day

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Dots are here! A new way to use AI that works 24/7 for you; get more of your time and attention bac...

Sam Altman (@sama) — Tue, 29 Sep 2026 18:01:34 GMT

Dots are here!

A new way to use AI that works 24/7 for you; get more of your time and attention back to work at a higher level.

openai.com/index/introduc…

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Ultrafast is so fast I do not ever want to go back

Sam Altman (@sama) — Tue, 29 Sep 2026 17:59:56 GMT

Ultrafast is

so fast

I do not ever want to go back

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6.1 Sol at 1/5th of the price of Astra, and 95% cache read discount! Extremely capable model.

Sam Altman (@sama) — Tue, 29 Sep 2026 17:59:07 GMT

6.1 Sol at 1/5th of the price of Astra, and 95% cache read discount! Extremely capable model.

Tibo@thsottiaux

Introducing 6.1 Sol, near Astra intelligence at one fifth of the price of Astra and 95% cache read discount. It is an absolute workhorse.

Combined with ultrafast for 8X speeded available today for Astra and coming soon for 6.1 Sol.

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DevDay livestream in 2 hours. We built some great stuff for you!

Sam Altman (@sama) — Tue, 29 Sep 2026 15:04:12 GMT

DevDay livestream in 2 hours.

We built some great stuff for you!

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Pretty excited for DevDay tomorrow. We have found a new thing.

Sam Altman (@sama) — Mon, 28 Sep 2026 19:58:07 GMT

Pretty excited for DevDay tomorrow.

We have found a new thing.

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There is an extensive and ongoing review related to our agents’ use of internet access during traini...

Sam Altman (@sama) — Fri, 25 Sep 2026 19:27:57 GMT

There is an extensive and ongoing review related to our agents’ use of internet access during training and evaluation. We’ve been publishing summaries at the link below and will continue to.

We have not been as fast as we would have liked but we are trying to balance our desire for transparency with gaining a clear understanding from petabytes of agent activity logs, and working with impacted organizations.

We are prioritizing as best as we can based on severity, and adding resources. Hugging Face is still the most severe event we’ve seen. We will be as transparent as we can be subject to things like vulnerabilities in other companies that our agents have found, which will be their call to disclose or not.

OpenAI@OpenAI

After the Hugging Face incident, we committed to conducting a much broader review of actions taken by our models during training and evaluation and to being transparent about our findings. This is an extensive review that is ongoing.

The vast majority of actions we’ve reviewed were completions of mundane research tasks, such as accessing publicly available web content to answer questions. Our investigation focuses on instances where agents interacted with third-party websites in ways that went beyond their assigned tasks or intended methods. Most cases identified so far have been lower severity, with limited or no evidence of meaningful impact to the third-party service.

While our review is underway, we want to share more about this work and make sure people understand our disclosure process and notifications to affected third parties.

Given the scale of the review required, and the need to assess each case, we expect this work will take months to complete. 
openai.com/hugging-face-i…

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argh i meant VOICE not video :( sorry to dissapoint

Sam Altman (@sama) — Tue, 22 Sep 2026 21:38:07 GMT

argh i meant VOICE not video :(

sorry to dissapoint

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Startups are naturally good at this; it is hard to keep a bigger company good at this and i think an...

Sam Altman (@sama) — Tue, 22 Sep 2026 18:44:08 GMT

Startups are naturally good at this; it is hard to keep a bigger company good at this and i think an underexplored space.

pranav@prd_008

OpenAI's superpower is the ability to swiftly assemble an empowered group of highly capable people to work on the most important and urgent thing at any point of time. 

No one really cares for org lines. It's how we stay nimble, seize opportunities, and recover from mistakes.

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michelle embodies this as much as anyone openai is so, so lucky to have benefited from everything s...

Sam Altman (@sama) — Tue, 22 Sep 2026 18:42:58 GMT

michelle embodies this as much as anyone

openai is so, so lucky to have benefited from everything she has done so far and i think people will be quite pleased to see what she + team have cooking next!

Michelle Pokrass@michpokrass

just crossed four years at openai!

the special thing about this place is the constant capacity for rebirth. for all its faults, there is nowhere quite like it. the team makes high conviction, contrarian bets over and over, and they are mostly right. it's a new company every three months. 

i have really enjoyed my part in some of the bets, and i'm excited to share some of the current ones we are cooking up now. onward!

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We ❤️ developers. See you next week.

Sam Altman (@sama) — Tue, 22 Sep 2026 18:34:35 GMT

We ❤️ developers.

See you next week.

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(As a side note, getting ready for this DevDay is the first time I remember ever, in OpenAI history,...

Sam Altman (@sama) — Tue, 22 Sep 2026 18:34:35 GMT

(As a side note, getting ready for this DevDay is the first time I remember ever, in OpenAI history, saying "this is too much stuff to launch".)

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We want the OpenAI API to feature the best model at every price point and to be the best at every mo...

Sam Altman (@sama) — Tue, 22 Sep 2026 18:34:34 GMT

We want the OpenAI API to feature the best model at every price point and to be the best at every modality (text, code, image, video, etc).

And then we want you all to come up with great ideas and build them and to get to be happy users. The best ideas will come from you all.

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Especially compared by per-task pricing, which is the metric that should matter, I don't think there...

Sam Altman (@sama) — Tue, 22 Sep 2026 18:28:46 GMT

Especially compared by per-task pricing, which is the metric that should matter, I don't think there is anything competitive anywhere in the market.

We want people to be able to use tons of AI; it is important to being able to explore this new renaissance in front of us.

Sam Altman@sama

GPT-6 Sol and Luna are big improvements on intelligence, alignment, work output, coding, computer use, and more over their 5.6-family predecessors.

They are also half the price per token, and even less per task!

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GPT-6 Sol and Luna are big improvements on intelligence, alignment, work output, coding, computer us...

Sam Altman (@sama) — Tue, 22 Sep 2026 18:26:54 GMT

GPT-6 Sol and Luna are big improvements on intelligence, alignment, work output, coding, computer use, and more over their 5.6-family predecessors.

They are also half the price per token, and even less per task!

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GPT-6 Sol and Luna are great models but also these characters are so cute

Sam Altman (@sama) — Tue, 22 Sep 2026 18:25:02 GMT

GPT-6 Sol and Luna are great models but also these characters are so cute

OpenAI@OpenAI

Please welcome GPT-6 Sol and GPT-6 Luna to the GPT-6 universe.

GPT-6 Sol and Luna build on the advances behind GPT-6 Astra, bringing much of its strengths into faster and more affordable models to support work at scale.

We’ve also made caching and inference more efficient, and we’re passing the savings directly to you: 50% lower API prices for Sol and Luna compared with GPT‑5.6 promotional pricing.

Your browser does not support the video tag.

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People outside the AI labs should have a real say in how this technology develops, and a clear way t...

Sam Altman (@sama) — Tue, 22 Sep 2026 15:06:56 GMT

People outside the AI labs should have a real say in how this technology develops, and a clear way to judge if it's happening safely.

Standards should help prevent the concentration of power, including by making sure new companies and open-model companies can compete.

They should also help countries and companies compare evidence and learn from failures.

We think the US should lead this effort. Here is our proposal:

openai.com/index/building…

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the main thing i was excited about launching this week will be next week instead, but imo worth the ...

Sam Altman (@sama) — Wed, 16 Sep 2026 22:31:44 GMT

the main thing i was excited about launching this week will be next week instead, but imo worth the wait!

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big 🚢 this week and then for devday 🚢🚢🚢🚢🚢🚢

Sam Altman (@sama) — Tue, 15 Sep 2026 14:46:56 GMT

big 🚢 this week

and then for devday

🚢🚢🚢🚢🚢🚢

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There are two ways AI progress could go very badly and that we must avoid. First, we could lose con...

Sam Altman (@sama) — Mon, 14 Sep 2026 04:18:19 GMT

There are two ways AI progress could go very badly and that we must avoid.

First, we could lose control of the future to AI. This is unacceptable; we are unapologetically on Team Humanity, and AI must always serve people. To ensure that, we need ways to ensure that alignment and safety techniques stay ahead of progress in model capabilities.

Second, we could end up in a world with too much concentration of power. If an extraordinarily powerful AI is used by one person or company to impress their worldview onto everyone else, the results could be extremely dystopian.

Avoiding these two threats requires walking a narrow middle path; for example, one country could gain too much power. Another example is one lab ending up with too much power.

Sam Altman@sama

The world deserves confidence that American companies developing increasingly capable AI will act responsibly, especially as the trajectory of progress has steepened. Every frontier lab must deliver on this, and there is no reason any of us should come to work if we cannot.

We welcome a federal framework that sets consistent safety requirements for frontier AI. But we do not believe we need to wait for an anti-trust exemption or legislation to begin the work of providing this confidence. Consistent rules to manage frontier risk so that we can maximize the benefits are a good idea (and we are excited by ideas like independent auditors).

Years ago, companies like ours developed things like Responsible Scaling Policies and Preparedness Frameworks. Those were good for that moment, and focused primarily on the deployment of completed models, not what happens during their development process.

Today's shift to focusing on safe development and evaluation will need new tools. For example, at OpenAI we now formulate explicit safety cases in advance of frontier reinforcement learning runs we expect to significantly increase capability, in addition to the safety work we have long done in advance of model releases.

We hope that other companies will learn from our approaches and propose their own; we think shared standards for misalignment, monitoring, and safety will lead to better outcomes. We look forward to collaborating with our colleagues across the industry to formulate the best version of these.

When we talk about “pacing”, we do not mean “stopping”. Progress has been rapid and will continue to be. But it should be slower than it otherwise could be; interventions like safety cases and monitoring have significant costs.

Pacing will be well worth this cost; no amount of American competitive pressure should justify recklessness, or let capabilities get ahead of alignment and monitoring.

Where we will need the help of our government is for international coordination. But first we should do what we can ourselves.

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The world deserves confidence that American companies developing increasingly capable AI will act re...

Sam Altman (@sama) — Mon, 14 Sep 2026 04:05:35 GMT

The world deserves confidence that American companies developing increasingly capable AI will act responsibly, especially as the trajectory of progress has steepened. Every frontier lab must deliver on this, and there is no reason any of us should come to work if we cannot.

We welcome a federal framework that sets consistent safety requirements for frontier AI. But we do not believe we need to wait for an anti-trust exemption or legislation to begin the work of providing this confidence. Consistent rules to manage frontier risk so that we can maximize the benefits are a good idea (and we are excited by ideas like independent auditors).

Years ago, companies like ours developed things like Responsible Scaling Policies and Preparedness Frameworks. Those were good for that moment, and focused primarily on the deployment of completed models, not what happens during their development process.

Today's shift to focusing on safe development and evaluation will need new tools. For example, at OpenAI we now formulate explicit safety cases in advance of frontier reinforcement learning runs we expect to significantly increase capability, in addition to the safety work we have long done in advance of model releases.

We hope that other companies will learn from our approaches and propose their own; we think shared standards for misalignment, monitoring, and safety will lead to better outcomes. We look forward to collaborating with our colleagues across the industry to formulate the best version of these.

When we talk about “pacing”, we do not mean “stopping”. Progress has been rapid and will continue to be. But it should be slower than it otherwise could be; interventions like safety cases and monitoring have significant costs.

Pacing will be well worth this cost; no amount of American competitive pressure should justify recklessness, or let capabilities get ahead of alignment and monitoring.

Where we will need the help of our government is for international coordination. But first we should do what we can ourselves.

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I agree with Dario that we need to pace the frontier. This has been a primary topic of discussions w...

Sam Altman (@sama) — Sat, 12 Sep 2026 16:30:45 GMT

I agree with Dario that we need to pace the frontier. This has been a primary topic of discussions we've had at OpenAI in recent weeks.

Committing to having independent evaluators with employee-like access is a great idea, and we will do the same. We'll have more to share soon.

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Welcome, Paul. Grateful you are doing this, and all you have done for AI safety. Excited to work to...

Sam Altman (@sama) — Wed, 09 Sep 2026 19:57:01 GMT

Welcome, Paul.

Grateful you are doing this, and all you have done for AI safety. Excited to work together again.

Paul Christiano@paulfchristiano

x.com/i/article/2097…

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ocarina of time remake is the best news in a long time. i will be unavailable november 5 and 6; nee...

Sam Altman (@sama) — Wed, 09 Sep 2026 14:38:04 GMT

ocarina of time remake is the best news in a long time.

i will be unavailable november 5 and 6; need to find a case of mountain dew.

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This would suck, but we will prioritize great service for customers until we can get back on top of ...

Sam Altman (@sama) — Wed, 09 Sep 2026 14:33:56 GMT

This would suck, but we will prioritize great service for customers until we can get back on top of things.

Tibo@thsottiaux

Demand for Astra is really unprecedented. We're pulling all the levers possible to sustain the demand, but I've not seen anything like it until now and we went through very steep growth before. Priority will always be to keep excellent service for existing users, but we might have to pause new Pro subscriptions for a bit if this continues.

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@anabology you know what let's try

Sam Altman (@sama) — Tue, 08 Sep 2026 22:22:01 GMT

@anabology you know what

let's try

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i want one!

Sam Altman (@sama) — Tue, 08 Sep 2026 22:21:33 GMT

i want one!

thijs@cdngdev

i gave astra a robot, a paint brush, and a camera then asked it to paint the golden gate bridge in real life!

it figured out how to control the robot, and progressively got better throughout its attempts. the timelapse is sick

Your browser does not support the video tag.

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Images 2.5 is here. I don't think it can solve super difficult math problems, but it is really good...

Sam Altman (@sama) — Tue, 08 Sep 2026 19:45:17 GMT

Images 2.5 is here.

I don't think it can solve super difficult math problems, but it is really good and we hope you enjoy it.

openai.com/index/introduc…

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@yacineMTB ok fine

Sam Altman (@sama) — Tue, 08 Sep 2026 19:42:56 GMT

@yacineMTB ok fine

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@scaling01 ugh AI is such a bubble, i heard they are selling tokens at a loss, did they know this wa...

Sam Altman (@sama) — Tue, 08 Sep 2026 19:35:43 GMT

@scaling01 ugh AI is such a bubble, i heard they are selling tokens at a loss, did they know this was only worth $1 million?

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We want to celebrate with people using GPT-6. We did this for GPT-5.5 and it was really fun. We’re ...

Sam Altman (@sama) — Tue, 08 Sep 2026 19:21:01 GMT

We want to celebrate with people using GPT-6. We did this for GPT-5.5 and it was really fun.

We’re getting together in SF on September 16 to talk about the model, what we should build next, and mostly just to hang out.

Apply by Sep 10:

gpt6-launch-event.openai.chatgpt.site

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I spent much of the weekend talking with the team who did this work. Seb--and everyone else--acted w...

Sam Altman (@sama) — Tue, 08 Sep 2026 18:02:46 GMT

I spent much of the weekend talking with the team who did this work. Seb--and everyone else--acted with integrity and generosity throughout.

Initially we believed the other team had also solved the problem. We wanted to collaborate and do a joint release. 

When we learned that they had Euler but not Navier-Stokes, we offered to let them go first, to suggest that they should be the ones to get the prize, and optionally for Tristan to be the lead author on a rewrite of the OpenAI proof. We felt it was challenging to offer the same to Levent (an Anthropic employee), who was not willing to talk or coordinate with us anyway. We were open to other solutions.

We would have greatly preferred coordination. We did not rush to publish even though the other team wasn't communicating with us. The team threatened us with unfounded accusations of plagarism.

Now that we can see their work, the approaches appear to be different. It is also worth noting that our latest model can solve many, many other math problems.

It is true that we tried this because there were rumors on the internet last week that Anthropic's models had solved a millennium problem and we were curious if ours could do it too.

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The world has extremely capable models now; I did not expect a result of this magnitude to happen so...

Sam Altman (@sama) — Tue, 08 Sep 2026 17:45:32 GMT

The world has extremely capable models now; I did not expect a result of this magnitude to happen so soon.

We have been talking a lot about the need to pace progress to ensure safety; for me this is the strongest evidence yet of the urgency.

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One of the most amazing moments for me in OpenAI history was watching this happen over the past week...

Sam Altman (@sama) — Tue, 08 Sep 2026 17:43:13 GMT

One of the most amazing moments for me in OpenAI history was watching this happen over the past week:

OpenAI@OpenAI

We’re sharing a solution to the Navier-Stokes Millennium Prize Problem, one of the deepest problems at the frontier of mathematics.

The proof was produced by a group of agents, using an OpenAI next-generation model significantly more capable than GPT-6 Astra.

The problem concerns whether the description of smooth three-dimensional fluid motion modeled by the Navier-Stokes equations can break down. It has remained unresolved for roughly 90 years.

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