Portrait of Xun Wu

Microsoft Research

Xun Wu (吴浔)

Researcher · Large Language Models

Email: xunwu [at] microsoft.com

I am a researcher at Microsoft Research. My research focuses on post-training for large language models, mixture-of-experts, and low-bit language models. I am broadly interested in building frontier foundation models.

I received my master's degree in Computer Software Engineering from Tsinghua University in 2024.

Publications (selected)

2026

  1. ICLR
    zhao2026geometric.png
    Geometric-Mean Policy Optimization
    Yuzhong Zhao, Yue Liu, Junpeng Liu, Jingye Chen, Yaru Hao, Tengchao Lv, and 5 more authors
    In International Conference on Learning Representations, 2026
  2. arXiv
    ye2026onpolicycontext.png
    On-Policy Context Distillation for Language Models
    Tianzhu Ye, Li Dong, Xun Wu, Shaohan Huang, and Furu Wei
    arXiv preprint arXiv:2602.12275, 2026

2025

  1. NeurIPS
    guo2025reward.png
    Reward Reasoning Models
    Jiaxin Guo, Zewen Chi, Li Dong, Qingxiu Dong, Xun Wu, Shaohan Huang, and 1 more author
    In Advances in Neural Information Processing Systems, 2025
  2. NeurIPS
    jiang2025think.png
    Think Only When You Need with Large Hybrid-Reasoning Models
    Lingjie Jiang, Xun Wu, Shaohan Huang, Qingxiu Dong, Zewen Chi, Li Dong, and 4 more authors
    In Advances in Neural Information Processing Systems, 2025

2024

  1. arXiv
    wu2024mixture.png
    Mixture of LoRA Experts
    Xun Wu, Shaohan Huang, and Furu Wei
    arXiv preprint arXiv:2404.13628, 2024

Awards