Xian Li @xl_nlp
Research Scientist @AIatMeta FAIR. NLP, ML. Opinions are my own. California, USA Joined January 2019-
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(🧵) Today, we release Meta Code World Model (CWM), a 32-billion-parameter dense LLM that enables novel research on improving code generation through agentic reasoning and planning with world models. ai.meta.com/research/publi…
We released 44B synthetic tokens from our CoT-guided rewriting, offering higher quality pretraining data than the average human-written web texts📈 🤗Data: huggingface.co/datasets/faceb… 📜Paper: arxiv.org/abs/2506.04689 (accepted at #COLM2025) Excited to see what the community builds!
More and better data for general reasoning beyond math? NaturalThoughts outperforms OpenThoughts3, LIMO, S1k, etc. on GPQA-Diamond, SuperGPQA, and MMLU Pro. Download 1M+ reasoning prompts: huggingface.co/datasets/faceb…
More and better data for general reasoning beyond math? NaturalThoughts outperforms OpenThoughts3, LIMO, S1k, etc. on GPQA-Diamond, SuperGPQA, and MMLU Pro. Download 1M+ reasoning prompts: huggingface.co/datasets/faceb…
Love this project: nanoGPT -> recursive self-improvement benchmark. Good old nanoGPT keeps on giving and surprising :) - First I wrote it as a small little repo to teach people the basics of training GPTs. - Then it became a target and baseline for my port to direct C/CUDA…
Love this project: nanoGPT -> recursive self-improvement benchmark. Good old nanoGPT keeps on giving and surprising :) - First I wrote it as a small little repo to teach people the basics of training GPTs. - Then it became a target and baseline for my port to direct C/CUDA…
🌉 Bridging Offline & Online RL for LLMs 🌉 📝: arxiv.org/abs/2506.21495 New paper shows on verifiable & non-verifiable tasks: - Online DPO & GRPO give similar performance. - Semi-online (iterative) DPO with sync every s steps (more efficient!) works very well also. - Offline DPO…
The future of pretraining is synthetically organic ♻️♻️🌱🌱 We show that grounded synthetic data outperforms high-quality human-written web data such as curated DCLM.
The future of pretraining is synthetically organic ♻️♻️🌱🌱 We show that grounded synthetic data outperforms high-quality human-written web data such as curated DCLM.
Scaling RL is 🔥 what's the fuel? We propose a new paradigm to generate "synthetic environments", unlimited tasks with verifiable rewards for self-improvement. Welcome to the era of experience 🙌
Scaling RL is 🔥 what's the fuel? We propose a new paradigm to generate "synthetic environments", unlimited tasks with verifiable rewards for self-improvement. Welcome to the era of experience 🙌
This is exactly why we need to train the model specifically for human-agent collaborations. Check out a benchmark that we have made for “vibe coding” x.com/yifeizhou02/st…, existing models are still far from perfect and reasoning only seems to overfit more.
This is exactly why we need to train the model specifically for human-agent collaborations. Check out a benchmark that we have made for “vibe coding” x.com/yifeizhou02/st…, existing models are still far from perfect and reasoning only seems to overfit more.
How to improve LLMs for vibe coding? We released a benchmark and an RL algorithm!
How to improve LLMs for vibe coding? We released a benchmark and an RL algorithm!
As reasoning models are getting stronger, we need challenging and diverse questions which can elicit more thinking. Here're 1M+ reasoning questions beyond math and code to accelerate your work, whether you're building open R1 or distilling from strong reasoning models 🚀🚀🚀
As reasoning models are getting stronger, we need challenging and diverse questions which can elicit more thinking. Here're 1M+ reasoning questions beyond math and code to accelerate your work, whether you're building open R1 or distilling from strong reasoning models 🚀🚀🚀
"Pretraining as we know it will end". Enter CoCoMix 🥥🌪️We explored predicting concepts interleaving with next-token prediction, specifically predicting interpretable features from SAE. It demonstrates that steerability can be baked into LLM from the beginning!
"Pretraining as we know it will end". Enter CoCoMix 🥥🌪️We explored predicting concepts interleaving with next-token prediction, specifically predicting interpretable features from SAE. It demonstrates that steerability can be baked into LLM from the beginning!
💭🔎 Introducing EvalPlanner – a method to train a Thinking-LLM-as-a-Judge that learns to generate planning & reasoning CoTs for evaluation. Strong performance on RewardBench, RM-Bench, JudgeBench & FollowBenchEval. Paper 📄: arxiv.org/abs/2501.18099
We replicated the DeepSeek-R1-Zero and DeepSeek-R1 training on 7B model with only 8K examples, the results are surprisingly strong. 🚀 Starting from Qwen2.5-Math-7B (base model), we perform RL on it directly. No SFT, no reward model, just 8K MATH examples for verification, the…
Our Coconut work (learning continuous latent CoT) has opened sourced now. Welcome to play with it: github.com/facebookresear…
New paradigm of reasoning 🥥🥥🥥 brilliant work led by @Ber18791531
New paradigm of reasoning 🥥🥥🥥 brilliant work led by @Ber18791531
Open science is how we continue to push technology forward and today at Meta FAIR we’re sharing eight new AI research artifacts including new models, datasets and code to inspire innovation in the community. More in the video from @jpineau1. This work is another important step…
We are hiring 2025 research interns at FAIR. Topics of interest include LLM reasoning, planning, alignment, synthetic data, efficient architecture and training algorithms, etc. Apply at metacareers.com/jobs/532549086…
Strong models for llm as a judge released from Jason's team and Meta. Really excited to see how far we can bring this capability in open models.
Strong models for llm as a judge released from Jason's team and Meta. Really excited to see how far we can bring this capability in open models.
Releasing model, data, and code for LLM judge!
Releasing model, data, and code for LLM judge!
While o1 is impressive, for math problems that require out-of-box thinking, o1 still does poorly. Surprised to see o1-preview cannot even detect some obvious errors in its logic chain. See below for a few examples. Maybe o1 (from what it shows in o1-preview) assumes "there is…
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Bill Yuchen Lin @billyuchenlin
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Yuandong Tian @tydsh
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Edward Grefenstette �... @egrefen
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Ananya @ananyaaiml
10 Followers 195 Following love ML research, travelling and cats undergrad stats at UniMelb | 🦋 @ananyaml
shailja Thakur @shailjaThakur3
161 Followers 749 Following Research Scientist @IBMResearch | ex Postdoc @NYUCyber | PhD @UWaterloo
SunLotusBliss @SunLotusBliss
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The fright to troll g... @right2farmbears
1K Followers 7K Following I'm done with Twitter for posting, just for news, until the properly fix the censorship The right to subsistence farming and trading shall not be infringed!
𝐕𝐢𝐭𝐚𝐥�... @VitalyButsan
273 Followers 8K Following I help marketing to look & feel professional ⚛︎ Conservative, Family values first 🀨
taek holla @Hode2efgc
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Patrick Drake @time8machine
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Jun-En Ding @CYh4lhDXrLDakuk
123 Followers 848 Following Ph.D student at https://t.co/gAqHRrfV9b |Prev. Research Center for Information| 🏥https://t.co/9KQTpTB0a8 | AI for healthcare/Multimodal Learning/Neuroscience.
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998 Followers 2K Following PhD student @berkeley_ai, Prev: Gemini @GoogleDeepMind, AI Resident @MetaAI. Creating intelligence.
Chuanyang Jin @chuanyang_jin
461 Followers 385 Following PhD @JohnsHopkins | Intern @AIatMeta FAIR ⏰ Past: @MITCoCoSci & @MIT_CSAIL & @nyuniversity
Hasan Can @HCSolakoglu
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155 Followers 406 Following PhD student @umdcs @ml_umd. Prev @sjtu1896. Working on #MachineLearning #GenAI #LLMs.
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682 Followers 417 Following @NYU_Courant @nyuniversity MS CS, Prev @Adobe @Salesforce, @cohere Community Lead, @EPFL_en scholar
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428K Followers 3K Following AI research paper tweets, ML @Gradio (acq. by @HuggingFace 🤗) dm for promo ,submit papers here: https://t.co/UzmYN5YmrQ
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955K Followers 765 Following Professor at NYU. Chief AI Scientist at Meta. Researcher in AI, Machine Learning, Robotics, etc. ACM Turing Award Laureate.
Aran Komatsuzaki @arankomatsuzaki
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717K Followers 288 Following Together with the AI community, we are pushing the boundaries of what’s possible through open science to create a more connected world.
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Graham Neubig @gneubig
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Jacob Andreas @jacobandreas
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William Wang @WilliamWangNLP
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Sara Hooker @sarahookr
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Yi Tay @YiTayML
47K Followers 82 Following research scientist @googledeepmind ✨♊, model co-lead/captain of gemini deepthink imo gold medal 🥇, opinions are my own.
Lucas Beyer (bl16) @giffmana
110K Followers 523 Following Researcher (now: Meta. ex: OpenAI, DeepMind, Brain, RWTH Aachen), Gamer, Hacker, Belgian. Anon feedback: https://t.co/xe2XUqkKit ✗DMs → email
Mike Lewis @ml_perception
8K Followers 242 Following Llama3 pre-training lead. Partially to blame for things like the Cicero Diplomacy bot, BART, RoBERTa, kNN-LM, top-k sampling & Deal Or No Deal.
Alexis Conneau @alex_conneau
35K Followers 190 Following Co-founder and CEO https://t.co/efv72CKpAG (@WaveFormsAI) - Ex @OpenAI GPT-4o/AVM Audio Research Lead - #Her #TARS - Ex @AIatMeta, @Polytechnique (X11)
Google DeepMind @GoogleDeepMind
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Sebastian Ruder @ ACL @seb_ruder
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726 Followers 666 Following FAIR, Foundational Data Research, #MetaCLIP (scaling CLIP data from scratch) for DINO, Llama, JEPA, PE, Movie Gen etc. @aiatmeta
Shuchao Bi @shuchaobi
13K Followers 692 Following Research @Meta Superintelligence Labs, RL/post-training/agents; Previously Research @OpenAI on multimodal and RL; Opinions are my own.
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10K Followers 226 Following @thinkymachines. formerly: - @openai: RL, synthetic data, efficient models - @berkeley_ai: decision transformer, universal computation
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695 Followers 380 Following RL PhD @NUSingapore | Intern @AIatMeta FAIR | Undergrad @PKU1898 | Building autonomous decision making system | Prev @deepseek_ai | DeepSeek-V2/VL/Prover SPIRAL
Despoina Magka @MarlaMagka
593 Followers 593 Following Software engineer at Meta London, @MetaAI. PhD Artificial Intelligence, Oxford. Tweets in English, Greek, French, German, Spanish. From Athens.
Alexander Holden Mill... @alex_h_miller
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Rohan Pandey @khoomeik
39K Followers 2K Following descending cross-entropy to ascend entropy || prev research @OpenAI @CarnegieMellon '23
❄️Andrew Zhao❄�... @_AndrewZhao
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Drew Bent @drew_bent
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马东锡 NLP @dongxi_nlp
29K Followers 786 Following Prev. PhD @Stockholm_Uni | Alumni @KTHuniversity @uppsalauni Sharing insights on AI, autonomous agents, and large language & reasoning models
Paria Rashidinejad @paria_rd
169 Followers 312 Following Assistant Professor @USC ⠀ ⠀ ⠀ ⠀ ⠀ ⠀ ⠀ ⠀ ⠀ ⠀ ⠀ ⠀ Research Scientist @AIatMeta FAIR ⠀ ⠀ ⠀⠀ ⠀ ⠀ ⠀ ⠀ PhD @berkeley_ai @CHAI_Berkeley
Prime Intellect @PrimeIntellect
48K Followers 28 Following find compute. train models. contribute to open superintelligence. https://t.co/ZRZOsRRbwr
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Yanda Chen @yanda_chen_
3K Followers 609 Following Member of Technical Staff @AnthropicAI | PhD @ColumbiaCompSci | NLP & ML | Prev Intern @MSFTResearch, @AmazonScience
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3K Followers 537 Following Chief AI Officer @genesistxai. Previously, Research Scientist @GoogleDeepMind, @GoogleAI in #GoogleBrain, @Waymo, @SandiaLabs, @UNM, @UIUC.
Jon Lai @Tocelot
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982 Followers 1K Following Principal Researcher at Tencent, ex-DeepMinder (@GoogleDeepMind), ex-SAILer (@SeaAIL)
Yifei Zhou @YifeiZhou02
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Brandon Trabucco @brandontrabucco
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Bill Yuchen Lin @billyuchenlin
25K Followers 3K Following Grok Code @xAI. Ex: Affiliate Assistant Prof @UW, Research Scientist @allen_ai, Google AI, Meta FAIR.
Quanquan Gu @QuanquanGu
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Jihoon Tack @jihoontack
728 Followers 678 Following Incoming Senior Researcher at @MSFTResearch | PhD @kaist_ai | Google PhD Fellow | Prev: Visiting @oxcsml, Research Intern at FAIR @AIatMeta
Andrew Cohen @andrew_e_cohen
226 Followers 570 Following Reinforcement learning @AIatMeta | Previously #mlagents
Xiang Yue @xiangyue96
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The AI Timeline @TheAITimeline
24K Followers 1 Following covering the latest AI & LLM research /// see "highlights" for all previous weekly threads /// building the best AI paper search engine @findmypapersai
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Machine Learning Stre... @MLStreetTalk
35K Followers 638 Following MLST is by Dr. Tim Scarfe @ecsquendor w/ cameos from @DoctorDuggar https://t.co/5YCv2SdFwN (early access/priv.discord) - Sponsor us!
Michael Levin @drmichaellevin
64K Followers 3K Following Scientist at Tufts University; my lab studies anatomical and behavioral decision-making at multiple scales of biological, artificial, and hybrid systems.
Aleksa Gordić (水�... @gordic_aleksa
26K Followers 229 Following getting us to singularity with friends computers can be understood: https://t.co/doHE1Qv2Sj x @GoogleDeepMind @Microsoft tensor core maximalist
Shibo Hao @Ber18791531
2K Followers 1K Following Ph.D. student @UCSanDiego Previous Research Scientist Intern @AIatMeta. B.S. in Computer Science @PKU1898 Coconut, Reasoning-via-planning, ToolkenGPT
Nenad Tomasev @weballergy
6K Followers 1K Following Senior staff research scientist at DeepMind. Opinions are my own. Re-tweets and favorites not to be considered as endorsements.
METR @METR_Evals
12K Followers 29 Following An AI research non-profit advancing the science of empirically testing AI systems for capabilities that could threaten catastrophic harm to society.
Avi Singh @avisingh599
2K Followers 1K Following Gemini @GoogleDeepMind. Previously worked on robots. Ask for my strava and goodreads :)
Zhihong Shao @zhs05232838
9K Followers 782 Following Researcher @deepseek_ai | Ph.D. @TsinghuaCoAI | Ex. @MSFTResearch | Recent: DeepSeek-R1, DeepSeek-Coder-v2, DeepSeekMath, DeepSeek-Prover, Math-Shepherd, ToRA.
Jiaxin Wen @jiaxinwen22
4K Followers 275 Following PhD-ing @UCBerkeley. Part-time @AnthropicAI. Part-time eater. Prev @Tsinghua_Uni. Try to understand and control intelligence as a human.
cool ai and ml papers @aimodelsfyi
891 Followers 26 Following Scanning repos, journals, and social media to bring you bite-size reviews of AI researchTrends for United States
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