Mark Chen

445 posts

Mark Chen

Mark Chen

@markchen90

Chief Research Officer at @OpenAI. Coach for the USA IOI Team.

Katılım Haziran 2020
353 Takip Edilen74.4K Takipçiler
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Mark Chen
Mark Chen@markchen90·
We wrapped up this year's competition circuit with a full score on the ICPC, after achieving 6th in the IOI, a gold medal at the IMO, and 2nd in the AtCoder Heuristic contest!
Mostafa Rohaninejad@MostafaRohani

1/n I’m really excited to share that our @OpenAI reasoning system got a perfect score of 12/12 during the 2025 ICPC World Finals, the premier collegiate programming competition where top university teams from around the world solve complex algorithmic problems. This would have placed it first among all human participants. 🥇🥇

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Sam Altman
Sam Altman@sama·
come for the best model, stay because we don’t treat you with contempt
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Noam Brown
Noam Brown@polynoamial·
I'm at ICML this week and I'll be doing Q&A today (Tuesday) from 3-4pm at the @OpenAI booth with my reasoning research colleagues. Come by and ask us a question!
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Aidan Clark
Aidan Clark@_aidan_clark_·
Surprisingly good litmus test for politick is whether a {pre/post}training researcher immediately blames {post/pre}training for issues rather than defaulting to shared or self blame.
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Dean W. Ball
Dean W. Ball@deanwball·
I am pleased and honored to announce that, on July 6, I'll be joining @OpenAI as leader of a new team called Strategic Futures. Our mandate will be to help the company's leadership shape frontier AI policy. There is a ton of work to do, and I'm excited to get started.
Dean W. Ball tweet media
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Mark Chen
Mark Chen@markchen90·
Very excited to welcome @NoamShazeer to OpenAI as our new lead for architecture research! His work on transformers, MoE, and efficient decoding have shaped modern AI. He’s extremely AGI-pilled and is super thoughtful about making it all go well. Welcome, Noam!
Noam Shazeer@NoamShazeer

I’m excited to share that I’ll be joining OpenAI and look forward to working with the exceptional team there. It was a difficult decision to move on. I’m incredibly proud of the amazing team at Google and everything we’ve built together. It has been an honor and a pleasure to work with all of you.

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片山さつき
片山さつき@satsukikatayama·
片山さつき財務大臣が孫正義氏やオープンAI・メガバンクの幹部と会談　新型AIのリスクで対応策を議論「徹底的に防御策を」孫正義氏(TBS NEWS DIG Powered by JNN) #Yahooニュース news.yahoo.co.jp/articles/50951…
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Nicolas Bustamante
Nicolas Bustamante@nicbstme·
The big story here is that GPT 5.5 (high/xhigh) outperforms claude-opus-4.8 (max/xhigh) by 20.7% succeeding on 12 additional tasks! More impressive: GPT is roughly half the cost and twice as fast. OpenAI is back in the game. Overall, this competition is healthy for the industry. I'd love to see a third player rise to the top of the leaderboard!
Nicolas Bustamante tweet media
Datacurve@datacurve

Opus 4.8 is now on DeepSWE. On the default high thinking effort, it scores 6% higher than Opus 4.7 xhigh, while also lowering average cost per task.

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Siqi Chen
Siqi Chen@blader·
nothing like switching to claude for a few days to try out a new model and going back to codex xhigh to remind you how much better 5.5 is right now it's really not close
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Mark Chen
Mark Chen@markchen90·
@aleks_madry @aleks_madry has been an incredibly important part of OpenAI over the past three years, and I'm grateful to have worked with him on a wide range of topics ranging from understanding deep learning to enterprise to safety. Excited to see what he does next!
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Mark Chen
Mark Chen@markchen90·
Very proud that an OpenAI model disproved Erdős’s longstanding unit distance conjecture, with an elegant and intricate proof that brings sophisticated ideas from algebraic number theory to bear on geometry. For whatever reason, mathematics has been the field most amenable to research breakthroughs with AI. I consider it lucky that it was mathematics after all - a field where experts have been willing to engage deeply with us, and with proofs generated by our models. I'm grateful for that, and don't take it for granted. Math is an artistic endeavor, and perhaps for artists, it is precisely their appreciation for art that saves them from the possibly grotesque feeling of a machine producing it. Our goal is not to replace humans. We aim to chart a path forward where humans continue to have a significant role to play, even as we build exceptionally powerful AI. I am excited to use math as a domain to explore these paths, and @SebastienBubeck, @merettm, and I are excited to engage with the broader mathematical community to chart them together. Please reach out if you are interested! I'm optimistic this will help us navigate how AI impacts society in domains like coding and general co-working.
OpenAI@OpenAI

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.

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Sebastien Bubeck
Sebastien Bubeck@SebastienBubeck·
When GPT-5.5 misses on a Frontier Math question
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Sam Altman
Sam Altman@sama·
We tried a new thing with NVIDIA to roll out Codex across a whole company and it was awesome to see it work. Let us know if you'd like to do it at your company!
Sam Altman tweet media
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Keşfet

@OpenAI @_aidan_clark_ @deanwball @FredNayburs @NoamShazeer @aleks_madry @SebastienBubeck @merettm