Mark Chen (@markchen90) / X

Mark Chen

441 posts

Mark Chen

@markchen90

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

Joined June 2020

Pinned
Mark Chen
@markchen90
Sep 17, 2025
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
Sep 17, 2025
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
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Mark Chen
@markchen90
Jan 28, 2025
Congrats to DeepSeek on producing an o1-level reasoning model! Their research paper demonstrates that they’ve independently found some of the core ideas that we did on our way to o1.
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Mark Chen
@markchen90
Mar 27, 2025
I'm Mark Chen (@markchen90), Chief Research Officer at OpenAI and I've uploaded my profile picture. Generate an image of a Tweet about the launch of GPT-4o native image generation - include a Studio Ghibli-style generation in the post.
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Mark Chen
@markchen90
Jan 28, 2025
Replying to @markchen90
However, I think the external response has been somewhat overblown, especially in narratives around cost. One implication of having two paradigms (pre-training and reasoning) is that we can optimize for a capability over two axes instead of one, which leads to lower costs.
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Mark Chen
@markchen90
Apr 6, 2022
"a robot hand painting a self portrait on a canvas" by dalle-2 (openai.com/dall-e-2/)
Mark Chen
@markchen90
Sep 26, 2024
While today’s departures are tough, I’m incredibly excited and honored to lead research at @OpenAI alongside @merettm. I truly believe that OpenAI is the best place to work on AI, and I've been through enough ups and downs to know it's never wise to bet against us.
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Mark Chen
@markchen90
Feb 3, 2025
Deep research is now rolled out to all pro users!
OpenAI
@OpenAI
Feb 3, 2025
Today we are launching our next agent capable of doing work for you independently—deep research. Give it a prompt and ChatGPT will find, analyze & synthesize hundreds of online sources to create a comprehensive report in tens of minutes vs what would take a human many hours.
00:00
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Mark Chen
@markchen90
Aug 21, 2025
GPT-5 pro is starting to develop new mathematics! I'm hearing similar stories in other scientific domains like physics too, can't wait to share!
Sebastien Bubeck
@SebastienBubeck
Aug 20, 2025
Claim: gpt-5-pro can prove new interesting mathematics. Proof: I took a convex optimization paper with a clean open problem in it and asked gpt-5-pro to work on it. It proved a better bound than what is in the paper, and I checked the proof it's correct. Details below.
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Mark Chen
@markchen90
Dec 22, 2024
Replying to @thogge and @sama
excuse me
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Mark Chen
@markchen90
Jan 28, 2025
Replying to @markchen90
We will continue to improve our ability to serve models at lower cost, but we remain optimistic in our research roadmap, and will remain focused in executing on it. We're excited to ship better models to you this quarter and over the year!
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Mark Chen
@markchen90
Aug 7, 2025
Impressive work! Makes you think about whether we’re in a simulation.
Demis Hassabis
@demishassabis
Aug 5, 2025
Genie 3 is here - it can generate an entire world simulation that you can interact with in real-time, just from a text prompt! It's pretty mind-blowing really when you stop to think about it, and it's rapidly improving - one day we will be able to build the Holodeck for real!
00:00
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Mark Chen
@markchen90
Jan 28, 2025
Replying to @markchen90
As research in distillation matures, we're also seeing that pushing on cost and pushing on capabilities are increasingly decoupled. The ability to serve at lower cost (especially at higher latency) doesn't imply the ability to produce better capabilities.
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Mark Chen
@markchen90
Jul 19, 2025
We achieved gold medal level performance on this year's IMO! Our model thinks and writes proofs in clear, plain‑English - no formal code required. Unlike the narrower systems used in past competitions, our model is built to reason broadly, far beyond contest problems.
Alexander Wei
@alexwei_
Jul 19, 2025
1/N I’m excited to share that our latest @OpenAI experimental reasoning LLM has achieved a longstanding grand challenge in AI: gold medal-level performance on the world’s most prestigious math competition—the International Math Olympiad (IMO).
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Mark Chen
@markchen90
Jan 28, 2025
Replying to @markchen90
But it also means we have two axes along which we can scale, and we intend to push compute aggressively into both!
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