Szymon Sidor

Noam Brown

@polynoamial

Researching reasoning @OpenAI | Co-created Libratus/Pluribus superhuman poker AIs, CICERO Diplomacy AI, and OpenAI o3 / o1 / 🍓 reasoning models

Mark Chen

@markchen90

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

Lilian Weng

@lilianweng

Co-founder of Thinking Machines Lab @thinkymachines; Ex-VP, AI Safety & robotics, applied research @OpenAI; Author of Lil'Log

Eric Jang

@ericjang11

Sebastien Bubeck

@SebastienBubeck

I work on AI at OpenAI. Former VP AI and Distinguished Scientist at Microsoft.

Jakub Pachocki

@merettm

OpenAI

Jim Fan

@DrJimFan

NVIDIA Director of Robotics & Distinguished Scientist. Co-Lead of GEAR lab. Solving Physical AGI, one motor at a time. Stanford Ph.D. OpenAI's 1st intern.

Barret Zoph

@barret_zoph

@openai Past: - CTO & Co-Founder Thinking Machines Lab (@thinkymachines) - VP Research (Post-Training) @openai - Research Scientist at Google Brain

Jason Wei

@_jasonwei

ai researcher @meta superintelligence labs, past: openai, google 🧠

Liam Fedus

@LiamFedus

Building industrial-scale science at @periodiclabs Past: VP of Post-Training @OpenAI; Google Brain

Jerry Tworek

@MillionInt

CEO and co-founder of Core Automation former VP of RL @ OpenAI : reasoning models, o3, o1, GPT4, ChatGPT, Codex, RL for robots cautious AI optimist

Joshua Achiam

@jachiam0

Freedom, flourishing, and abundance. Chief Futurist @openai. Main author of http://spinningup.openai.com

Luke Metz

@Luke_Metz

OpenAI Previously: Thinking Machines, Google Brain

Aleksander Madry

@aleks_madry

OpenAI and MIT faculty (on leave)

Catherine Olsson

@catherineols

Hanging out with Claude, improving its behavior, and building tools to support that @AnthropicAI 😁 prev: @open_phil @googlebrain @openai (@microcovid)

Aidan Clark

@_aidan_clark_

Qualitative Mathematics @OpenAI Ex: @DeepMind Hae sententiae verbaque mihi soli sunt

Matthew Johnson

@SingularMattrix

Researcher at Google Brain. I work on JAX (https://github.com/google/jax).

(((ل()(ل() 'yoav))))👾

@yoavgo

Chelsea Sierra Voss

@csvoss

engineeress ✨ Member of Technical Staff @openai // serious play // past @pilothq, @sendwaveapp, @khanacademy, CS/math @MIT, 2x IBO gold

Sham Kakade

@ShamKakade6

Harvard Professor. Full stack ML and AI. Co-director of the Kempner Institute for the Study of Artificial and Natural Intelligence.

David Dohan

@dmdohan

reducing perplexity @openai | past: probabilistic programs, proteins, science & reasoning @ google brain 🧠

Irwan Bello

@IrwanBello

Supercomputers & Friends, AI & Science. Founding team & Research Lead at @reflection_ai. Past: @OpenAI, Founding team @character_ai, Google Brain

sarah guo

@saranormous

startup investor/helper, founder @conviction. accelerating AI adoption, interested in progress. tech podcast: @nopriorspod

Taco Cohen

@TacoCohen

Slop janitor & post-trainologer at Meta / FAIR. Into codegen, RL, equivariance. Spent time at Qualcomm, Scyfer (acquired), UvA, Deepmind, OpenAI.

Erik Brynjolfsson

@erikbryn

Director @DigEconLab Co-founder, @Workhelix @StanfordHAI @SIEPR @Stanford https://www.amazon.com/Second-Machine-Age-Prosperity-Technologies/dp/0393350649

Leo Gao

@nabla_theta

working on AGI alignment. prev: GPT-Neo, the Pile, LM evals, RL overoptimization, scaling SAEs to GPT-4, interp via circuit sparsity. EleutherAI cofounder.

Aditya Ramesh

@model_mechanic

VP Robotics @OpenAI

Yisong Yue

@yisongyue

Machine Learning @Caltech (@YueLabCaltech). AI for invention at @AsariAILabs.

will depue

@willdepue

retired ex @openai (sora 1 & 2, posttraining o3/4o, pretraining moonshots)

Shengjia Zhao

@shengjia_zhao

Chief Scientist @ Meta MSL. Formerly MTS @ OpenAI, PhD @ Stanford. I train models. All opinions my own.

Ethan Perez

@EthanJPerez

Large language model safety

rapha

@rapha_gl

making models programmable @ openai

Eric Wallace

@Eric_Wallace_

research @openai

Bryan Johnson

@bryan_johnson

Conquering death will be humanity’s greatest achievement.

augustus odena

@gstsdn

Something new. Previously: AI research at TBD Labs / Meta; cofounder at @AdeptAILabs; Invented Scratchpad / Chain-of-Thought; Google Brain

Lukasz Kaiser

@lukaszkaiser

Ashlee Vance

@ashleevance

Writing at http://www.corememory.com and host of the Core Memory podcast. 2X NYT best-seller. Filmmaker @HBO (Wild, Wild Space) + @Netflix (Don't Die).

Guillaume Lample @ NeurIPS 2024

@GuillaumeLample

Cofounder & Chief Scientist http://Mistral.ai (@MistralAI). Working on LLMs. Ex @MetaAI | PhD @Sorbonne_Univ_ | MSc @CarnegieMellon | X11 @Polytechnique

Yang Song

@DrYangSong

Research Principal of MSL

Mo Bavarian

@mobav0

Scaling up RL at OpenAI 🍓 Optimization and long context research before. Math PhD, MIT.

Bill Peebles

@billpeeb

head of sora @openai 🇺🇸🇺🇸🇺🇸

Matt Brockman

@badphilosopher

playing in the sand

Hyung Won Chung

@hwchung27

AI Research Scientist @Meta Superintelligence Labs. Past: @OpenAI / @Google Brain / PhD @MIT

Tejal Patwardhan

@tejalpatwardhan

research @openai // pain is the moat

Scott Gray

@scottgray76

GPU Geek at @OpenAI. I have a long standing interest in neuroscience and its application to machine learning. He/Him.

Hongyu Ren

@ren_hongyu

research @meta superintelligence. CS PhD @stanford. prev @openai.

Michael Truell

@mntruell

@cursor_ai CEO

Kevin Roose

@kevinroose

NYT tech columnist, Hard Fork co-host, high-perplexity language model. Writing a book about AGI.

Rohan Pandey

@khoomeik

descending cross-entropy to ascend entropy @PeriodicLabs || prev research @OpenAI @CarnegieMellon '23

Ananya Kumar

@ananyaku

Researcher at Meta TBD Labs. Previously core contributor to o1, o3, gpt5, at OpenAI. PhD at Stanford University AI Lab with Percy Liang and Tengyu Ma

Christine McLeavey

@mcleavey

@openai audio team: gpt-4o, jukebox & musenet

Ted Sanders

@sandersted

Research at OpenAI. Be kind to others, and yourself.

Tao Xu

@txhf

Learning Machine at OpenAI

Sam Schoenholz

@sschoenholz

@openai previously: @thinkymachines, google brain.

Stephen McAleer

@McaleerStephen

AI researcher at Anthropic

Caitlin Kalinowski

@kalinowski007

Builder-strategist in physical AI. Boards: Axon, Institute of Contemporary Art SF.

Ludwig Schmidt

@lschmidt3

Assistant professor at @Stanford and member of the technical staff at @AnthropicAI.

Mostafa Dehghani

@m__dehghani

/google_deepmind/gemini/.

Ilya Kostrikov

@ikostrikov

Pre-Training Researcher @OpenAI, previously: RL/post-training @OpenAI, Postdoc at UC Berkeley @berkeley_ai, Researcher at Google Brain, PhD in CS @CILVRatNYU

Rui Shu

@_smileyball

I draw smileyball http://instagram.com/smiley._.ball Writing organic artisanal handcrafted code @OpenAI Previously doing the same @Stanford

Jiahui Yu

@jhyuxm

Lead Multimodal @Meta Superintelligence Lab. Previously led Perception @OpenAI; co-led Gemini Multimodal @GoogleDeepMind.

Yu Bai

@yubai01

Training @OpenAI. Previously @SFResearch, PhD @Stanford.

Kamalika Chaudhuri

@kamalikac

Director and Research Scientist, FAIR @ Meta. Former Professor at UCSD. Researcher in AI privacy, security, and generalization.

Zhiqing Sun

@EdwardSun0909

Agents @Meta MSL TBD Lab. previously posttraining research @OpenAI train LLMs to do things: deep research, chatgpt agent, etc. CS PhD @LTIatCMU

Jimmy Apples 🍎/acc

@apples_jimmy

Wagmi. 2025. As featured in Bloomberg. As quoted by Nobel Prize winner Demis Hassabis. As mentioned on the Lex Fridman Podcast💺

Tim Brooks

@_tim_brooks

superintelligence @ Meta

Brandon McKinzie

@mckbrando

research @OpenAI | prev: multimodal @Apple, physics/cs @UCBerkeley

Clive Chan

@itsclivetime

perplexity per picojoule @openai / formerly a car @tesla dojo

James Campbell

@jam3scampbell

post training @OpenAI

Shuchao Bi

@shuchaobi

Research at Meta Superintelligence Labs, RL/post-training/agents; Previously Research at OpenAI on multimodal and RL; Opinions are my own.

Andrew Carr 🤸

@andrew_n_carr

co-founder leading science @getcartwheel co-founder advisor @arcade_ai Past: Codex @OpenAI, Brain @GoogleAI, world ranked Tetris player

Evan Morikawa

@E0M

🤖 @Generalistai. Prev: led eng at @openai. Launched & scaled ChatGPT, GPT-4, DALL·E, APIs. Dir Eng @Nylas, Co-Founder @Proximate, @OlinCollege alum.

heiner

@HeinrichKuttler

ex @xAI, @InflectionAI, @AIatMeta, @DeepMind, @Google, @LMU_Muenchen, PhD math-ph. Opinions my own. (Can be yours for a small fee.)

Ahmed El-Kishky

@ahelkky

Researcher at OpenAI

Shunyu Yao

@ShunyuYao12

Language agents

Alex Graveley

@alexgraveley

Co-creator Perplexity Computer, GitHub Copilot, Dropbox Paper. 2x CEO. Thruhiker. Survivor 🎗️

Ethan Caballero

@ethanCaballero

ML @Mila_Quebec ; previously @GoogleDeepMind

Dan Roberts

@danintheory

Scientist @OpenAI. Prev. co-founder @diffeo, acquired by @salesforce // co-authored The Principles of Deep Learning Theory // studied gravity.

Steven Heidel

@stevenheidel

API @OpenAI | 🏳️‍🌈 he/him

Denis Yarats

@denisyarats

Cofounder & CTO @perplexity_ai

Yash Patil

@ypatil125

Co-Founder, CEO @appliedcompute prev: @OpenAI, @Stanford

Laurens van der Maaten

@lvdmaaten

Member of Technical Staff at Anthropic. Ex-Meta. t-SNE. Llama 3. DenseNet. Web-scale weakly supervised vision. CrypTen.

Jong Wook Kim 💟

@_jongwook_kim

Member of Technical Staff @OpenAI; previously at @nyuMARL, @SpotifyResearch, @pandoramusic, @kakaocorpglobal, and @NCSOFT

Pavel Izmailov

@Pavel_Izmailov

Researcher @AnthropicAI 🤖 Assistant Professor @nyuniversity 🏙️ Previously @OpenAI #StopWar 🇺🇦

Yaroslav Bulatov

@yaroslavvb

@southparkcommons (early OpenAI, Google Brain, Meta) https://yaroslavvb.substack.com/ https://medium.com/@yaroslavvb https://yaroslavvb.blogspot.com/

Roberta Raileanu

@robertarail

Open-Ended Team Lead and Senior Staff Research Scientist @GoogleDeepMind. Honorary Lecturer @UCL. ex @Meta | @NYU | @Princeton.

Armand Joulin

@armandjoulin

distinguished scientist, @googledeepmind. ex director of emea at @metaai. led a few open projects: llama, fasttext, dino, and now gemma.

Reiichiro Nakano

@reiinakano

i like building awesome things with awesome people 🇵🇭 🇯🇵

yobibyte

@y0b1byte

the only yobibyte @ NVIDIA

Ivan Zhao

@ivanhzhao

CEO @NotionHQ. Tools for thought.

Ross

@rpoo

alth0u🧶

@alth0u

general partner at a16z art is a line through your thoughts erstwhile child

Ruoming Pang

@ruomingpang

Toby Pohlen

@TobyPhln

Sleeping. Previously founding team @xAI, engineer @GoogleDeepMind. @RWTH alumnus.

Cristóbal Valenzuela

@c_valenzuelab

@runwayml Co-Founder & Co-CEO

Rianne van den Berg

@vdbergrianne

Principal research manager at Microsoft Research Amsterdam. Formerly at Google Brain and University of Amsterdam. PhD in condensed matter physics.

Marco Mascorro

@Mascobot

Researching LLMs | Roboticist | Prev: Partner @a16z (inv: @cursor_ai, @thinkymachines, @bfl_ml, @WaveFormsAI, @deeptuneai, etc), cofounder @Fellow_AI

Ross Taylor

@rosstaylor90

Co-founder and CEO @GenReasoning. Previously lots of other things like: reasoning lead Meta AI, Llama 3/2, Galactica, Papers with Code.

Dave

@dece

Tim Zaman

@timzaman

Frontier Clusters at OpenAI. Formerly DeepMind, Tesla AI, X, NVIDIA.

Omar Sanseviero

@osanseviero

Developer Experience Lead at @GoogleDeepMind Building Gemini API, Gemma, AI Studio and more AI products. My views ex-Chief Llama Officer @huggingface 🇵🇪🇲🇽

Kate Rouch 🛡️

@kate_rouch

Passionate about using creativity to help founders + their category defining companies win. OpenAI CMO 🚀🌚 Proud mom 👧👶🏼. Opinions = mine.

shyamal

@shyamalanadkat

applied AI. prev @openai @dukeu. explorer in the age of research 🇮🇳

hunter

@hunterlightman

openai

Stanislas Polu

@spolu

co-founder+engineer(https://dust.tt); alumni(https://openai.com, https://stripe.com, https://stanford.edu, https://polytechnique.edu);

Ben Hamner

@benhamner

Sumble co-founder and CTO. Learning high-quality, structured data about the world. Formerly @kaggle

Peter J. Liu

@peterjliu

Building @getcompoundai (hiring: http://twentylabs.ai/careers). Was Research Scientist @ Google Brain / DeepMind, language model research. 🇨🇦🇺🇸

Brydon Eastman

@brhydon

🇨🇦 Mathematician (heavy on the ish) @thinkymachines Prev. MTS @OpenAI; PhD @WaterlooMath Certified wife guy, featured twice in Lego Magazine © ☕//🤔➡️💻

Sriram Krishnan

@sriramk

AI at the @whitehouse. pro wrestling fan. official: @skrishnan47

Fred Ehrsam

@FEhrsam

Co-founder @Nudge, @Paradigm, @Coinbase

Jared Palmer

@jaredpalmer

VP CoreAI @Microsoft Previously, VP of AI @Vercel. Creator of @v0 and @aisdk. Founder of @Turborepo (acquired by Vercel)

Jay Hack

@mathemagic1an

Head of AI @clickup. Tweets about AI, computing and knowledge work. Previously founder @codegen / ML @palantir / CS @stanford. Not a pseudonym.

Dr. Alex Wissner-Gross

@alexwg

The Innermost Loop, also on Substack (http://alexwg.org/su), LinkedIn (http://alexwg.org/li), Spotify (http://alexwg.org/sp), Threads (http://alexwg.org/th), and YouTube (http://alexwg.org/yt).

Psyho

@FakePsyho

Humanity's Last Programmer; Game Designer; Problem Solver; past: OpenAI (Dota), Pro Competitive Programmer, Poker

william

@wgussml

cofounder @ Project Prometheus, prev cofounder @generalagents, OpenAI, helped build copilot & MineRL, creator of ell

Michelle Fradin

@michelle_fradin

making helpful machines @OpenAI, investing in friends, previously @Sequoia, @Lawrencetheband fan

Atty Eleti

@athyuttamre

voice @openai

Zhuohan Li

@zhuohan123

building @vllm_project at @meta | ex-openai | cs phd @ 🌁 uc berkeley | machine learning system | the real agi is the friends we made along the way

Abhi Venigalla

@ml_hardware

Researcher @Databricks. Former @MosaicML, @CerebrasSystems. Addicted to all things compute.

Hadi Salman

@hadisalmanX

Research Scientist @OpenAI Previously: PhD @MIT @MSFTResearch @UberATG @SCSatCMU @AUB_Lebanon

Thomas Dimson

@turtlesoupy

Technical Staff @OpenAI. Former CEO @illdotinc (acq. OpenAI). Authored “the algorithm” @Instagram. 🇨🇦. Purple monkey dishwasher.

Ben Newhouse

@newhouseb

member of technical staff @openai, cofounder @aidkit_tech, former head of sync @dropbox, cofounded bubbli (acquired by dropbox), previously made yelp monocle.

Rylan Schaeffer

@RylanSchaeffer

AI RS @ Meta TBD. On-Leave from Stanford w/ @sanmikoyejo. Prev @ Gemini, Meta, MIT, Harvard, Uber, UCL, UC Davis

Ryan Greene

@rabrg

ex @OpenAI

Simón

@simonpfish

beep boop

Mostafa Rohaninejad

@MostafaRohani

RL Researcher @ OpenAI

Giambattista 'Gb' Parascandolo

@giambattista92

research fellow at @OpenAI for reasoning prev also @DeepMind, Google X, @MPI_IS, @ETH

Hugh Zhang

@hughbzhang

Allison Tam

@allisontam_

research @OpenAI - prev @DeepMind

Ashvin Nair

@ashvinair

RL foundations @cursor_ai. Prev: o1, o3, Code Interpreter @openai, 9 years learning to poke by poking at UC Berkeley

Felipe Such

@felipesuch

@OpenAI

filipe

@filipeabperes

seeking scientific speedups @OpenAI

julia villagra

@juliacvillagra

@coreautoai ex-Chief People Officer OpenAI | ex-HRT Head of People founder, Tertulia | board member, ICA SF | Mom

Łukasz Kondraciuk

@lukasz_kondr

Strawberry training infra lead @ OpenAI prev: CS at University of Warsaw, ACM ICPC 2022 silver medalist

Diane Yoon

@dorkydi

Jonathan Raiman

@jonathanrraiman

❤️ training deep nets :) AI research on large generative models, RL, OpenAI Five @openai and PrefixRL @Nvidia Hopper co-creator

nervouscomputer

@nervouscomputer

iced latte in my veins