Applied AI Engineering Leader @OpenAI. MIT & McKinsey alumni.
New York, USA
Joined April 2009
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- Following1.1K
- Followers10.5K
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Pinned Tweet
Benefit all
one of the most beautiful things about OpenAI is that every employee really has a voice.
i wanted to capture what it feels like to work here, what our mission means to me, and why you should join us. so i made this video with Codex, shared it with the team, and they felt it was worth producing and sharing with the world.
this is our mission. and it’s why i’m here.
Salil Sethi retweeted
major price cuts today:
*80% drop for GPT-5.6 Luna, now $0.20 per million input tokens and $1.20 per million output
*20% drop for GPT-5.6 Terra, to $2/$12
*GPT-5.6 Sol gets Fast mode in the API, up to 2.5x the speed for 2x the price, same intelligence
Salil Sethi retweeted
our mission is to democratize ai. open weight models unlock more experimentation and competition, accelerate progress, and help make ai economically sustainable at the scale of billions of everyday tasks.
very happy to see this and proud to be at openai.
OpenAI joined the coalition for open AI.
I'm thrilled to see this, and I have real respect for openAI by signing.
Now all that's missing is @AnthropicAI , but I have my doubts they'll sign on.
Salil Sethi retweeted
You are smarter than this Ro. Imagine if Bernie had taxed @elonmusk 100% on his PayPal capital gains. We would have no @Tesla or @SpaceX - none of those jobs or GDP. Who do you think allocated the capital better for society? He will already pay $100 B + in taxes - more than any human ever. I hope he donates some to kids via @TrumpAccounts to make every kid a shareholder in 🇺🇸 & continues investing all his heart, soul & money for the benefit of America & all humanity! 🇺🇸🚀🤍
Musk is worth more than South Africa’s GDP. @BernieSanders and I proposed a 5% tax on people like him.
In one year, it could fund:
- free public college & trade school
-$10/day childcare
- Special-needs education nationwide
Wealth inequality is the moral failure of our time.
Salil Sethi retweeted
We've known about LLM test-time compute scaling since @OpenAI o1.
Yet 2 years later labs still report scalar evals for models; safety orgs are still surprised when a scaffold does better via 100x inference; and RSPs still ignore inference budget when deciding critical thresholds.
Salil Sethi retweeted
I have a new kind of big button that I can press for Codex. Over the next 100 days, we will select one person per day who does impressive or incredibly useful work with Codex and give them 10X usage limits for a month to see what they can do with it.
First one tomorrow.
Salil Sethi retweeted
An OpenAI model has achieved a major breakthrough in mathematics, by disproving a central conjecture in discrete geometry that was first posed by Paul Erdős in 1946.
This is the first time AI has autonomously solved a prominent open problem central to a field of mathematics.
Today, we share a breakthrough on the planar unit distance problem, a famous open question first posed by Paul Erdős in 1946.
For nearly 80 years, mathematicians believed the best possible solutions looked roughly like square grids.
An OpenAI model has now disproved that belief, discovering an entirely new family of constructions that performs better.
This marks the first time AI has autonomously solved a prominent open problem central to a field of mathematics.
Most model launches get reduced to “better reasoning.”
What feels different about GPT-5.5 is that the unit of progress is shifting from the answer to the completed task: understanding intent, using tools, checking work, and carrying messy workflows forward.
Salil Sethi retweeted
Introducing GPT-5.5... together with a ton of new Codex features (more on those in the next hour).
Included in all paid plans and coming to API soon. Update your Codex app or CLI to use it.
openai.com/index/introducing…
The team really cooked here!
Exciting news - GPT-Image-2 by @OpenAI has claimed the #1 spot across all Image Arena leaderboards!
A clean sweep with a record-breaking +242 point lead in Text-to-Image - the largest gap we’ve seen to date.
- #1 Text-to-Image (1512), +242 over #2 (Nano-banana-2 with web-search aka gemini-3.1-flash-image)
- #1 Single-Image Edit (1513), +125 over #2 (Nano-banana-pro aka gemini-3-pro-image)
- #1 Multi-Image Edit (1464), +90 over #2 (Nano-banana-2)
No model has dominated Image Arena with margins this wide.
Huge congratulations to @OpenAI on this major breakthrough in image generation! More performance breakdowns by category in the thread below.
Salil Sethi retweeted
Seriously stop everything you are doing and use codex desktop app new computer use. Absolutely mind blowing
Salil Sethi retweeted
Codex just got a lot more powerful.
Computer use, in-app browser, image generation and editing, 90+ new plugins to connect to everything, multi-terminal, SSH into devboxes, thread automations, rich document editing. Learns from experience and proactively suggestions work. And a ton more.
