Fei Fang
@fangf07
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Associate Professor, Carnegie Mellon University
Pittsburgh, PA
Joined November 2016
✨ Did you know that NOT using all generated rollouts in GRPO can boost your reasoning LLM? Meet PODS! We down-sample rollouts and train on just a fraction, delivering notable gains over vanilla GRPO. (1/7)
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We release fully async RL system AReaL-boba² for LLM & SOTA code RL w. Qwen3-14B! @Alibaba_Qwen #opensource 🚀system&algorithm co-design → 2.77x faster ✅ 69.1 on LiveCodeBench 🔥 multi-turn RL ready 🔗 Project: https://t.co/YUa03ppHBp 📄 Paper: https://t.co/DMZ7YDLt6L 1/3👇
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I’m so proud of you!
Another life update!! 🎉 I’m joining @JHUCompSci as an Assistant Professor starting Fall 2026! Apply to work with me on reinforcement learning, foundation models, & human-centered AI. Let’s build better AI agents 🤖🙆♀️🦀 Before that, I’ll join @NYU_Courant as an Assistant
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Another life update!! 🎉 I’m joining @JHUCompSci as an Assistant Professor starting Fall 2026! Apply to work with me on reinforcement learning, foundation models, & human-centered AI. Let’s build better AI agents 🤖🙆♀️🦀 Before that, I’ll join @NYU_Courant as an Assistant
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Excited to be at #aamas2025 ! - My keynote talk at C-MAS workshop today: 2-2:45pm, Maquette A - Will attend panel at ALA workshop today: 4:30-5:30pm, Salon 2 - Siyu Liu (PhD advised by @___tiffanyb___ ) will present our joint paper on Friday 10:45am, Salon 3
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Congratulations to @steph_milani for successfully defending her PhD thesis on “Human-Centered Reinforcement Learning”. Special thanks to her committee members Geoff Gordon @hongshenus @katjahofmann @OriolVinyalsML
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Congratulations to @du_yinuo (co-advised by me and @CotyGonzalez12) for successfully defending her PhD thesis on “Human and AI Decision Making in Cyber Secuirty: A Multiagent Modeling Perspective”. Thanks to committee members Prashanth Rajivan @___tiffanyb___ Christian Lebiere
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🎉 Milestone Release! AReaL-boba, our latest #RL system! https://t.co/xmZe676YIZ
#AI • data/code/model ALL🔥 #OPENSOURCE • Full #SGLang & 1.5x faster on 7B RL • SOTA 7B math reasoning: 61.9 AIME24 & 48.3 AIME25 • 200-sample 32B tuning match QwQ on AIME24 @Alibaba_Qwen 1/3 👇
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Congratulations! I’m so proud of you, Lily!
Congratulations to my former PhD student Lily Xu @lilyxu0 for her PhD thesis "High-stakes decisions from low-quality data: AI decision-making for planetary health" being selected as runner-up for the doctoral dissertation award (VLDDA) at the AAMAS conference 2025 @AAMASconf !
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Join us bweteen 9am-12pm on Dec 15th at #NeurIPS2024 (rooms 215-216) as we announce the winners of the Concordia Contest and hear talks from Sasha Vezhnevets, @lrhammond, and @ChandlerDSmith, with discussion from @fangf07, @jzl86, @Diyi_Yang, and José Hernández-Orallo.
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Stephanie’s oral presentation today at GenAI4Health workshop! 12/14 | East Meeting Room 16 🕙 10:40am - Oral Presentation 🕐 1:00pm - Poster Session 🕓 4:20pm - Poster Session Paper: https://t.co/HwPbym3UVj Workshop:
genai4health.github.io
GenAI4Health2025 - Join leading researchers and practitioners at NeurIPS 2025 to explore the potential, trust, and policy compliance of Generative AI in healthcare. Submit your paper by August 22,...
🇨🇦 Hi! I’m attending my last @NeurIPSConf as a PhD student, presenting Patient-Ψ at a few workshops. I'm on the job market, looking for TT faculty roles & post-docs. DM if you'd like to chat (or invite me to a party 🥳)!
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Another exciting work to be presented at today’s poster session this afternoon!
Excited to share our poster on Multi-Agent Imitation Learning! 🚀 We explore what the right objective should be when agents can behave strategically—and surprisingly, even exact BC fails to provide any guarantees 🕙 Dec 13th 4:30–7:30 PM 📍 West Ballroom #6101
#NeurIPS2024
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Welcome to our poster this afternoon!
We’ll be presenting our work on Global Rewards in Restless Bandits today at #NeurIPS2024 in the West Ballroom #5500 at 4:30 PM!
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Do reviewers appropriately update their scores based on rebuttals? In this PLOS ONE paper with @theryanliu, Steven Jecmen, @fangf07, and Nihar Shah, we present a randomized controlled trial that suggests that, at least under certain conditions, they do. https://t.co/z6f6ajFT3L
journals.plos.org
Objective Peer review frequently follows a process where reviewers first provide initial reviews, authors respond to these reviews, then reviewers update their reviews based on the authors’ response....
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We are honored that our paper assignment algorithm is being used for NeurIPS 2024! Also glad to contribute to the analysis of the deployed assignment :) @YixuanEvenXu
Announcing the Results of the NeurIPS 2024 Experiment on Improving the Paper-Reviewer Assignment! https://t.co/jSffZA1gw6
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I’m honored to be invited to visit MIT ORC tomorrow and give a talk tomorrow 4:15-5:15pm on Multi-Systems and Machine Learning for Societal Challenges at MIT E51-149. Looking forward to it!
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Stephanie has done amazing work in human-centered reinforcement learning and she is now on the job market!
🎇 I’m on the academic job market! I’m a PhD candidate at @mldcmu. My research tackles challenges that arise from the sequential nature of human-AI interaction. Toward this goal, my work involves: 🤖 reinforcement learning, 🧠 foundation models, and 👩💻 human-centered AI.
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Restless bandits have been used to model multi-armed bandit problems where arms have both states and rewards. While restless bandits have been applied to various domains, they critically rely on the assumption that rewards are separable into a sum of per-arm rewards. 1/
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