Wei Fu

fuwth17 AT gmail DOT com

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I am an AI researcher at Meta Superintelligence Labs (MSL).

Before joining Meta, I earned my PhD from the Institute for Interdisciplinary Information Sciences (IIIS) at Tsinghua University, where I was fortunate to be advised by Professor Yi Wu. I received my BEng from Tsinghua University’s Department of Electrical Engineering in 2021.

During my doctoral studies, I developed AReaL, the first open-source asynchronous reinforcement learning training system for LLM agents. The project has received more than 5,500 stars on GitHub.

I approach research with the mindset of a programmer.

Outside of work, I enjoy coding, cooking, listening to pop music, and working out.

Selected Publications

  1. ASearcher
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    Beyond Ten Turns: Unlocking Long-Horizon Agentic Search with Large-Scale Asynchronous RL
    Jiaxuan Gao , Wei Fu, Minyang Xie , Shusheng Xu , Chuyi He , Zhiyu Mei , Banghua Zhu , and Yi Wu
    Aug 2025
  2. AReaL
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    AReaL: A Large-Scale Asynchronous Reinforcement Learning System for Language Reasoning
    Wei Fu, Jiaxuan Gao , Xujie Shen , Chen Zhu , Zhiyu Mei , Chuyi He , Shusheng Xu , Guo Wei , Jun Mei , Jiashu Wang , and 3 more authors
    May 2025
  3. ReaLHF
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    ReaL: Efficient RLHF Training of Large Language Models with Parameter Reallocation
    Zhiyu Mei , Wei Fu, Kaiwei Li , Guangju Wang , Huanchen Zhang , and Yi Wu
    In MLSys 2025 (*: Equal Contribution) , May 2025
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    Is DPO Superior to PPO for LLM Alignment? A Comprehensive Study
    Shusheng Xu , Wei Fu, Jiaxuan Gao , Wenjie Ye , Weilin Liu , Zhiyu Mei , Guangju Wang , Chao Yu , and Yi Wu
    ICML. (Oral) , Jul 2024
  5. SRL
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    SRL: Scaling Distributed Reinforcement Learning to Over Ten Thousand Cores
    Zhiyu Mei* , Wei Fu*, Guangju Wang , Huanchen Zhang , and Yi Wu
    ICLR. (*: Equal Contribution) , May 2024
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    Revisiting Some Common Practices in Cooperative Multi-Agent Reinforcement Learning
    Wei Fu, Chao Yu , Zelai Xu , Jiaqi Yang , and Yi Wu
    ICML, Jul 2022