Zach (Zhen) Xu

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Hey I’m Zach! I am a first-year CS PhD student at University of Chicago, advised by Ce Zhang.

My research interests are centered on large language model with a recent focus on agentic systems, test-time scaling and interdisciplinary scientific applications.

I also contributed to the Codabench which is one of the most commonly used open source competition platforms accoding to ML Contests.

I am always excited to chat about interesting projects. Feel free to reach out!

News

Sep 30, 2024 I started my PhD at UChicago.

Selected publications

  1. Preprint
    When Does Divide and Conquer Work for LLM in Processing Long Context? A Noise Decomposition Framework
    Zhen Xu, Shang Zhu, Jue Wang, Junlin Wang, Ben Athiwaratkun, Chi Wang, James Zou, Ce Zhang
    preprint, 2025
  2. Patterns
    Codabench: Flexible, easy-to-use, and reproducible meta-benchmark platform
    Zhen Xu, Sergio Escalera, Adrien Pavão, Magali Richard, Wei-Wei Tu, Quanming Yao, Huan Zhao, Isabelle Guyon
    Patterns Cell Press, 2022