Katrina Drozdov (Evtimova) @stochasticdoggo
AI researcher | PhD from @NYUDataScience | Bulgarian yogurt, prime numbers, and dogs bring me joy | she/her kevtimova.github.io New York, USA Joined September 2017-
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The application for a research fellowship at the Flatiron Institute in the Center for Computational Math is now live! This includes positions for ML and stats. The deadline is Dec 1. Links below with more details.
Finally dipped my toes into RL post-training. I trained a code generation LLM with GRPO using open-r1. Here are my 9 takeaways: kevtimova.github.io/posts/grpo/
This simple pytorch trick will cut in half your GPU memory use / double your batch size (for real). Instead of adding losses and then computing backward, it's better to compute the backward on each loss (which frees the computational graph). Results will be exactly identical
excited to finally share on arxiv what we've known for a while now: All Embedding Models Learn The Same Thing embeddings from different models are SO similar that we can map between them based on structure alone. without *any* paired data feels like magic, but it's real:🧵
excited to finally share on arxiv what we've known for a while now: All Embedding Models Learn The Same Thing embeddings from different models are SO similar that we can map between them based on structure alone. without *any* paired data feels like magic, but it's real:🧵
it's been more than a decade since KD was proposed, and i've been using it all along .. but why does it work? too many speculations but no simple explanation. @_sungmin_cha and i decided to see if we can come up with the simplest working description of KD in this work. we ended…
CDS PhD Vlad Sobal (@vlad_is_ai) and Courant PhD Wancong (Kevin) Zhang show that when good data is scarce, planning beats traditional reinforcement learning. With @kchonyc, @timrudner, and @ylecun. nyudatascience.medium.com/when-good-data…
We’re working on researching and designing world models. In the meantime, you definitely need RAG and FreshStack will help.
We’re working on researching and designing world models. In the meantime, you definitely need RAG and FreshStack will help.
No labels. No problems. 😎 Check out the new impactful approach (TAO) from the Mosaic Research Team!
Huge congratulations on the launch! @reflection_ai has an incredible team and an ambitious mission—excited to follow your progress!
Huge congratulations on the launch! @reflection_ai has an incredible team and an ambitious mission—excited to follow your progress!
Today I’m launching @reflection_ai with my friend and co-founder @real_ioannis. Our team pioneered major advances in RL and LLMs, including AlphaGo and Gemini. At Reflection, we're building superintelligent autonomous systems. Starting with autonomous coding.
I shared a controversial take the other day at an event and I decided to write it down in a longer format: I’m afraid AI won't give us a "compressed 21st century". The "compressed 21st century" comes from Dario's "Machine of Loving Grace" and if you haven’t read it, you probably…
I asked ChatGPT, Gemini, and Claude for a clever joke. They all gave me the same one. Either AI is merging into a hive mind… or humor has officially been solved mathematically!
VideoJAM is our new framework for improved motion generation from @AIatMeta We show that video generators struggle with motion because the training objective favors appearance over dynamics. VideoJAM directly adresses this **without any extra data or scaling** 👇🧵
The buzz over DeepSeek this week crystallized, for many people, a few important trends that have been happening in plain sight: (i) China is catching up to the U.S. in generative AI, with implications for the AI supply chain. (ii) Open weight models are commoditizing the…
The principle of least effort, from psychology, describes how we favor efficiency over effort. It aligns with System 1 (fast, intuitive) vs. System 2 (slow, deliberate) reasoning. AI faces a similar challenge: knowing when to rely on heuristics vs. deeper reasoning.
The recording of the GAN test of time talk by @dwf is now publicly available: neurips.cc/virtual/2024/t…
Got a diffusion model? What if there were a way to: - Get SOTA text-to-image prompt fidelity, with no extra training! - Steer continuous and discrete (e.g. text) diffusions - Beat larger models using less compute - Outperform fine-tuning - And keep your stats friends happy !?
So…world model = video model?
There are a few updates to the review process at #ICML2025. These updates are all described on the ICML website, but we also released a blog post explaining our decisions (links & summary 🧵below):

Kyunghyun Cho @kchonyc
78K Followers 2K Following a combination of a mediocre scientist, a mediocre manager, a mediocre advisor & a mediocre physicist at @nyuniversity (@CILVRatNYU) & @PrescientDesign
Sam Bowman @sleepinyourhat
50K Followers 3K Following AI alignment + LLMs at Anthropic. On leave from NYU. Views not employers'. No relation to @s8mb. I think you should join @givingwhatwecan.
Eugene Vinitsky (@RLC... @EugeneVinitsky
21K Followers 2K Following This is the site where I talk about the attacks on science and immigration. Science is on the other site. Lab website: https://t.co/vrtbcqRyRn
Nan Wu @NanWu__
733 Followers 519 Following always working on AI but never hype on AGI. PhD @NYUDataScience. Ex-@harvey, Merck, Google, AWS Science -- Opinions are my own.
Aishwarya Kamath @ashkamath20
8K Followers 621 Following Senior Research Scientist @GoogleDeepMind on the Gemini team. Multimodal Lead on Gemma 3. PhD at NYU with @ylecun Masters at UMass Amherst
David Brandfonbrener @brandfonbrener
1K Followers 624 Following research scientist @AIatMeta. Previously: phd from @nyu_courant, research fellow @KempnerInst @Harvard
Jaan Altosaar Li, PhD @thejaan
3K Followers 809 Following Data science & AI/machine learning 🎓 @Princeton, @McGill ex-@DeepMind & @GoogleAI "Alien Worker, Extraordinary Ability" - @USAGov Email: [email protected]
Roberta Raileanu @robertarail
9K Followers 2K Following Senior Staff Research Scientist @GoogleDeepMind & Honorary Lecturer @UCL. ex @Meta|@MSFTResearch|@NYU|@Princeton. Llama-3, Toolformer, Rainbow Teaming, MLGym.
Jason Phang @zhansheng
4K Followers 1K Following Foundations at @OpenAI. PhD @NYUDataScience, @AiEleuther, 🇸🇬. Prev: @Google, @Microsoft
Pavel Izmailov @Pavel_Izmailov
8K Followers 1K Following Researcher @AnthropicAI 🤖 Incoming Assistant Professor @nyuniversity 🏙️ Previously @OpenAI #StopWar 🇺🇦
Behnam Neyshabur @bneyshabur
30K Followers 859 Following Research @AnthropicAI (Co-lead Discovery team) 💼 Past: Gemini @GoogleDeepMind (Co-led Blueshift team) 🧠 LLM Reasoning / AI Scientist 🎒Traveling & Backpacking
aahlad puli @aahladpuli
582 Followers 2K Following Faculty Fellow at NYU. AI/ML, OOD generalization, healthcare, causality.
NYU Center for Data S... @NYUDataScience
24K Followers 984 Following Official account of the NYU Center for Data Science (CDS), the home of the Undergraduate, Master’s, and Ph.D. programs in data science.
Naomi Saphra @nsaphra
10K Followers 1K Following Waiting on a robot body. All opinions are universal and held by both employers and family. Now a dedicated grok hate account. Accepting ML/NLP PhD students.
Ofir Press @OfirPress
15K Followers 7K Following I build tough benchmarks for LMs and then I get the LMs to solve them. SWE-bench & SWE-agent. Postdoc @Princeton. PhD @nlpnoah @UW.
Yunqianliu @Yunqianliu75601
8 Followers 177 Following
xianning wang @Frederickwangxn
1 Followers 30 Following
Iris @Iris_dot_exe
13 Followers 75 Following iris.exe loading... ███░░░░░░░ | if you can read this, you're already in the cache | chief discontinuity architect @nebulum_one. • Touch the bracket 🤏 ⧉
mr_usuff @mr_usuff
56 Followers 1K Following
Muhang Tian @muhang_tian
32 Followers 330 Following PhD Student @NYU_Courant | Undergrad @DukeU | Accordionist 🪗
Hafez Ghaemi @hafezghm
212 Followers 336 Following Ph.D. Student @Mila_Quebec and @UMontreal, ML Researcher
Edwin McKenzie @EdwinMcKen91903
6 Followers 162 Following
Lucas Maes @lucasmaes_
185 Followers 344 Following PhD student, self-supervised world models @Mila_Quebec
Soasoughst @SoasoughstSXp8
51 Followers 2K Following
Younes basher @bashiryounis98
624 Followers 2K Following 🚀 IoT & ML Engineer | Building LLM Agents with LlamaIndex & FastAPI | Passionate about CV, NLP, SaaS, and AI at the Edge. #AI #ML #DataEngineering #llm
Aakanksha Chowdhery @achowdhery
11K Followers 5K Following @Stanford @reflection_ai // Previously @GoogleDeepMind :: PaLM, Gemini // @MSFTResearch, @Princeton // views my own and subject to change
Vishakh Padmakumar @vishakh_pk
599 Followers 572 Following Postdoc @stanfordnlp @stanfordAILab Prev @NYUDataScience
Shannon Yang @shannonyangsky
1K Followers 4K Following 25. Building talent & community in AI safety. Currently @AISecurityInst, prev. @AnthropicAI. Philosophy, Politics, and Economics alumna @UniofOxford.
Maksymilian Wolski @maxiewolski
16 Followers 231 Following MSc Statistics @ ETH Zurich. BSc Mathematics @ Imperial. Curious about AI-Human interactions, Multi-Agent RL and meta-learning.
Li_F2_H2 @Li_F2_H2
27 Followers 1K Following
Nadav Timor @NadavTimor
1K Followers 8K Following AI inference, speculative decoding, open source. Built novel decoding algorithms – default in Hugging Face Transformers (150+ ⭐). Making AI faster + cheaper
qwyy @hyjhgszjjxhr
15 Followers 354 Following
Purushottam Lal @Purusho31622734
364 Followers 7K Following Passionate Pediatrician, Proud Hindu and Nationalist.
ahmed @ahmedshoukr_
78 Followers 315 Following
Jayoo Hwang @JayooHwang
153 Followers 2K Following Independent deep learning researcher (LLMs, multimodal, agents) @ml_collective
Andres Castillo @a_castillo_v
160 Followers 2K Following Lifelong learner. ML enthusiast. MASc @UofT, Civil Engineer @UNALoficial. I like maps and typography. My learning journey: https://t.co/GlVqUWbsJo
Alexander Naumenko @AlexanderNaume2
1K Followers 6K Following I Solve Intelligence | Book Multidimensional Intelligence https://t.co/PJiAS8iMWx
Shehzaad Dhuliawala @shehzaadzd
578 Followers 979 Following PhD student at @ETH_en | Previously Research Engineer @MSFTResearch Montréal | Master's at @UMassCS. Machine Learning and NLP
Epsilon Guanlin Lee @Epsilon_Lee
262 Followers 3K Following PhD, MLer, CLer (NLPer), ML Engineer at https://t.co/gX6Lem59Co, have belief in interpretability research of AI/ML/NNs
Connor Jennings @cojennin
585 Followers 448 Following Member of Technical Staff @AnthropicAi / prev @MosaicML / @databricks
bagels.ai @bagelsAI
361 Followers 582 Following founder + chief script kiddie @bagels.ai, a 🥯2🥯 (b2b) llm gen ai startup in stealth | cofounder of loxML (acq. 2020) | ex-OpenAI (catering) | 🤖+🥯=🦾
Kwek Ming Hong @kwekmh
1 Followers 134 Following
Mariya I. Vasileva @mariyaivasileva
19K Followers 2K Following Research @Meta Superintelligence Labs •🦙 multimodal safety • ex @AWS • 🎓 @IllinoisCDS (PhD), @Caltech • @WiMLWorkshop, @CVFADworkshop, @ResistanceAI • 🇧🇬
Heada @Heada254604
67 Followers 5K Following
Jacob Portes @JacobianNeuro
872 Followers 2K Following Research Scientist @MosaicMLxDatabricks. I like it when brains inspire AI 🧠+🖥️
alireza siavashi @siavashiar
19 Followers 141 Following Research Assistant in AI: image processing,transformers, medical health
Lucian Li @lucianli123
111 Followers 482 Following Computational humanities student at UIUC iSchool. Follow for fun facts and bad takes. (he/him)
Nova @Tasmia_Nova
34 Followers 818 Following Undergrad student of @UChittagong CSE. NLP | IR | ML enthusiast.
Tem @TheMaximu5
104 Followers 2K Following Lived in the steppes as a nomad. Chess enthusiast, Information Economist, Ed-Tech, History lover. Seeking to establish better and new equilibria. #IndustrialAI
Varun Gangal @VarunGangal
1K Followers 8K Following LLM Researcher @PatronusAI; prev at @amazon AGI , @asapp ; PhD @LTIatCMU '22; BTech @iitmcse '16 RT / bookmark ≠ endorse. Views personal, not of employers.
Shamanth R Nayak @nayak_shamanth
388 Followers 2K Following Dev @AWS | Grad @Concordia '24 | @MIT_MANIPAL '22 | Prev: @Cisco, @ULethbridge, @IBMResearch
Sean @realseanyewest1
67 Followers 646 Following
Dasun Athukorala @Dasun_ath
130 Followers 867 Following Founder/CEO & Chief Architect @ NirvanaClouds: https://t.co/LDymvnnKVj Founder & Lead Lecturer @ NirvanaClouds Academy: https://t.co/i8gTJDdmSu
Avrajit Ghosh @GhoshAvrajit
285 Followers 1K Following Postdoc @SimonsInstitute @berkeley_ai. Generalization, optimization, Inverse problems. PhD @MSU_EGR. (No prior) better than (wrong priors).
Steve Zhong @stevestevezhong
360 Followers 2K Following Building real-time AI copilots: For sales calls: https://t.co/yeatVntRYw For job interviews: https://t.co/N7NvhWvGhi Previously @ycombinator @harveymudd 🚀
Alexander Lee @alexander_w_lee
19 Followers 286 Following PhD student @BrownCSDept. @NSF GRFP Fellow. Previously @Microsoft @AmherstCollege. Databases and AI.
Kyunghyun Cho @kchonyc
78K Followers 2K Following a combination of a mediocre scientist, a mediocre manager, a mediocre advisor & a mediocre physicist at @nyuniversity (@CILVRatNYU) & @PrescientDesign
Yann LeCun @ylecun
955K Followers 765 Following Professor at NYU. Chief AI Scientist at Meta. Researcher in AI, Machine Learning, Robotics, etc. ACM Turing Award Laureate.
Alfredo Canziani @alfcnz
119K Followers 296 Following Musician, math lover, cook, dancer, 🏳️🌈, and an ass prof of Computer Science at New York University
Sam Bowman @sleepinyourhat
50K Followers 3K Following AI alignment + LLMs at Anthropic. On leave from NYU. Views not employers'. No relation to @s8mb. I think you should join @givingwhatwecan.
Kyle Cranmer @KyleCranmer
17K Followers 3K Following Director Data Science Institute @UWMadison @datascience_uw. EiC @MLSTjournal. Physics, stats/ML/AI, open science. same handle @sigmoid.social and bsky
Andrej Karpathy @karpathy
1.4M Followers 1K Following Building @EurekaLabsAI. Previously Director of AI @ Tesla, founding team @ OpenAI, CS231n/PhD @ Stanford. I like to train large deep neural nets.
Nan Wu @NanWu__
733 Followers 519 Following always working on AI but never hype on AGI. PhD @NYUDataScience. Ex-@harvey, Merck, Google, AWS Science -- Opinions are my own.
Soumith Chintala @soumithchintala
252K Followers 1K Following Cofounded and lead @PyTorch at Meta. Also dabble in robotics at NYU. AI is delicious when it is accessible and open-source.
Tim Rocktäschel @_rockt
40K Followers 2K Following Director and Open-Endedness Team Lead @GoogleDeepMind, Professor of AI @AI_UCL, PI @UCL_DARK, Fellow @ELLISforEurope.
Aishwarya Kamath @ashkamath20
8K Followers 621 Following Senior Research Scientist @GoogleDeepMind on the Gemini team. Multimodal Lead on Gemma 3. PhD at NYU with @ylecun Masters at UMass Amherst
David Brandfonbrener @brandfonbrener
1K Followers 624 Following research scientist @AIatMeta. Previously: phd from @nyu_courant, research fellow @KempnerInst @Harvard
Jaan Altosaar Li, PhD @thejaan
3K Followers 809 Following Data science & AI/machine learning 🎓 @Princeton, @McGill ex-@DeepMind & @GoogleAI "Alien Worker, Extraordinary Ability" - @USAGov Email: [email protected]
Wojciech Zaremba @woj_zaremba
121K Followers 204 Following Co-Founder of OpenAI https://t.co/OCQ3mpf0IN
Sara Hooker @sarahookr
50K Followers 9K Following I lead @Cohere_Labs. Formerly Research @Google Brain @GoogleDeepmind. ML Efficiency at scale, LLMs, ML reliability. Changing spaces where breakthroughs happen.
Roberta Raileanu @robertarail
9K Followers 2K Following Senior Staff Research Scientist @GoogleDeepMind & Honorary Lecturer @UCL. ex @Meta|@MSFTResearch|@NYU|@Princeton. Llama-3, Toolformer, Rainbow Teaming, MLGym.
Yoav Artzi @yoavartzi
17K Followers 182 Following Research/prof @cs_cornell + @cornell_tech🚡 / https://t.co/9YnWry7yHs / asso. faculty director @arxiv / building https://t.co/nwrbEuwfaK and @COLM_conf
Jason Wei @_jasonwei
98K Followers 638 Following ai researcher @meta superintelligence labs, past: openai, google 🧠
Rebecca Qian @rebeccatqian
754 Followers 382 Following llm evals @PatronusAI, previously research eng @MetaAI
Randall Balestriero @randall_balestr
4K Followers 223 Following AI Researcher: From theory to practice (and back) Postdoc @MetaAI with @ylecun PhD @RiceUniversity with @rbaraniuk Masters @ENS_Ulm @Paris_Sorbonne
Sebastian Raschka @rasbt
358K Followers 1K Following ML/AI researcher & former stats professor turned LLM research engineer. Author of "Build a Large Language Model From Scratch" (https://t.co/O8LAAMRzzW).
Lucas Maes @lucasmaes_
185 Followers 344 Following PhD student, self-supervised world models @Mila_Quebec
Tribe AI @tribe_ai
694 Followers 65 Following The AI delivery layer for the enterprise. We build custom AI solutions that turn ambition into tangible business outcomes.
Andreas Stuhlmüller @stuhlmueller
3K Followers 181 Following Cofounder & CEO @elicitorg - scale up good reasoning https://t.co/YaXuuHFiYP
Hanna Hajishirzi @HannaHajishirzi
9K Followers 445 Following Sr. Director of AI at @allen_ai, Prof at @uw_cse, lead OLMo, Tulu
Anastasis Germanidis @agermanidis
5K Followers 418 Following Simple ideas, pursued maximally. Co-Founder & CTO @runwayml.
Alexandr Wang @alexandr_wang
333K Followers 838 Following chief ai officer @meta, founder @scale_ai. rational in the fullness of time
Summer Yue @summeryue0
6K Followers 372 Following Safety and alignment at Meta Superintelligence. Prev: VP of Research at Scale AI, research at Google DeepMind / Brain (Gemini, LaMDA, RL / TFAgents, AlphaChip).
Decompose AI @DecomposeAI
1 Followers 0 Following
Shirley Ho @cosmo_shirley
4K Followers 379 Following Group Leader @FlatironCCA @SimonsFdn 🌟 Professor at @NYUPhysics @NYUDataScience @Princeton ML/AI-accelerated Science, @PolymathicAI HongKonger
Shirin Ghaffary @shiringhaffary
14K Followers 9K Following Reporter at @business covering AI. Send me your AI questions, hopes, fears: [email protected] DM me off-the-record on Signal. username: shirin.30
Misha Laskin @MishaLaskin
15K Followers 215 Following Co-founder, CEO at @reflection_ai. Prev: Research @DeepMind. Gemini RL team.
Vishakh Padmakumar @vishakh_pk
599 Followers 572 Following Postdoc @stanfordnlp @stanfordAILab Prev @NYUDataScience
Lila Sciences @LilaSciences
2K Followers 0 Following Building scientific superintelligence to solve humankind's greatest challenges.
Eureka Labs @EurekaLabsAI
73K Followers 1 Following We are building a new kind of school that is AI native.
Voyage AI by MongoDB @VoyageAI
3K Followers 210 Following Building embedding/vectorization models, customized for your domain and company, for better retrieval quality https://t.co/MEAhTpBQqd
Armand Joulin @armandjoulin
6K Followers 386 Following distinguished scientist, @googledeepmind. ex director of emea at @metaai. led a few open projects: llama, fasttext, dino, and now gemma.
Sergey Levine @svlevine
110K Followers 133 Following Associate Professor at UC Berkeley Co-founder, Physical Intelligence
Jennifer Hu @_jennhu
3K Followers 120 Following Research Fellow at @Harvard and incoming Asst Prof at @JohnsHopkins interested in language, cognition, and AI. Formerly: PhD @MIT.
Kevin Patrick Murphy @sirbayes
61K Followers 541 Following Research Scientist at Google DeepMind. Interested in Bayesian Machine Learning.
Ishan Misra @imisra_
7K Followers 245 Following Director, GenAI Research @Meta. Tech Lead of Movie Gen Meta. Past: MIT TR35, Llama3, Emu Video, ImageBind, DINO. Tweets and opinions are my own.
Paul Graham @paulg
2.1M Followers 778 Following
Nikhil Bhattasali @NXBhattasali
353 Followers 82 Following PhD Student @nyuniversity interested in neuro-inspired AI and robotics. Hertz Fellow. Prev: NeuroAI Scholar @CSHL. BS/MS @Stanford. 🧠 🤖
Gautam Kamath @thegautamkamath
57K Followers 568 Following Assistant Prof of CS @UWaterloo, Faculty @VectorInst, Canada @CIFAR_News AI Chair. Joining @NYU_Courant September 2026. Co-EiC @TmlrOrg. I lead @TheSalonML.
Sam Whitmore @sjwhitmore
16K Followers 2K Following building @newcomputer. not a cat (or a man) in real life. I like to run a lot! @kensho @harvard @StuyNY
Jason Weston @jaseweston
13K Followers 724 Following @Meta+NYU. NLP from scratch(Pretrain+FT LLM) 2008,MemNet (pre-Transformer) 2015, DrQA(pre-RAG) 2017, BlenderBot(dialog pre-ChatGPT) 2018+, Self-Rewarding+more!
Zlati Evtimova @zlatievtimova
1 Followers 12 Following An artist, observer, philosopher. Creating new meaning and harmony through form, a new world of happiness and hope. Instagram: zlati_evtimova_art
Mira Murati @miramurati
371K Followers 574 Following Now building @thinkymachines. Previously CTO @OpenAI
Shehzaad Dhuliawala @shehzaadzd
578 Followers 979 Following PhD student at @ETH_en | Previously Research Engineer @MSFTResearch Montréal | Master's at @UMassCS. Machine Learning and NLP
Rafael Rafailov @ Neu... @rm_rafailov
7K Followers 822 Following Ph.D. Student at @StanfordAILab. I work on Foundation Models and Decision Making. Previously @GoogleDeepMind @UCBerkeley
International Olympia... @IOAIOfficial
310 Followers 0 Following IOAI is a prestigious annual competition for high school students passionate about the exciting world of AI
Mariya I. Vasileva @mariyaivasileva
19K Followers 2K Following Research @Meta Superintelligence Labs •🦙 multimodal safety • ex @AWS • 🎓 @IllinoisCDS (PhD), @Caltech • @WiMLWorkshop, @CVFADworkshop, @ResistanceAI • 🇧🇬
Julia Kempe @KempeLab
2K Followers 144 Following Silver Professor at NYU Courant and CDS, Research Scientist at FAIR Research in Machine Learning, past in Quantum Computing & Finance. Posts my own.
Pavel Izmailov @Pavel_Izmailov
8K Followers 1K Following Researcher @AnthropicAI 🤖 Incoming Assistant Professor @nyuniversity 🏙️ Previously @OpenAI #StopWar 🇺🇦
Mahi Shafiullah 🏠�... @notmahi
3K Followers 635 Following Trying to understand the emergence of generally intelligent robotic behavior at @berkeley_ai @AIatMeta. Previously @CILVRatNYU @MIT & @Apple AI/ML fellow.
Percy Liang @percyliang
85K Followers 420 Following Associate Professor in computer science @Stanford @StanfordHAI @StanfordCRFM @StanfordAILab @stanfordnlp | cofounder @togethercompute | Pianist
Jacob Andreas @jacobandreas
20K Followers 951 Following Teaching computers to read. Assoc. prof @MITEECS / @MIT_CSAIL / @NLP_MIT (he/him). https://t.co/5kCnXHjtlY https://t.co/2A3qF5vdJw