About Me

I am currently a master’s student at Carnegie Mellon University in the Language Technologies Institute. I previously completed my undergraduate studies in Statistics at Zhejiang University. I have worked as a research intern at Alibaba Group, focusing on large-scale reinforcement learning to enhance the agentic search capabilities of LLMs.

Previously, I have worked with Prof. Arman Cohan and the YaleNLP group on LLM evaluations and information retrieval. I have also worked with Prof. Yang Yang on AI4Science (Foundation models for brain signal decoding).

🔥 News

  • 2025.08:   Joining CMU as a master student!
  • 2025.07:   Serving as a reviewer for EMNLP Demo Track.
  • 2025.06:   One Paper (Product-Searcher) submitted to EMNLP Industry Track!
  • 2025.05:   One Paper (Ref-long) accepted by ACL main!
  • 2025.03:   Joining Alibaba Group as a Research Intern!
  • 2024.11:   Present our work in-person at Miami, FL at EMNLP conference!
  • 2024.10:   New paper “TAIL: A Toolkit for Automatic and Realistic Long-Context Large Language Model Evaluation” has been accepted by EMNLP 2024 (Demo Track).
  • 2024.07:   Start as a visiting student at Yale University, working with Arman Cohan!
  • 2024.01:   Start my journey as an exchange student at HKUST!

📝 Publications

Under Review
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Product-Searcher: Real-World E-commerce Product DeepSearch via Reinforcement Learning

Gefei Gu*, Wenhui Chen, Qiankun Shi, WangZhenhai, Xuanzhou Liu, Weiqi Wang, Chenhao Ding, Guannan Zhang

ACL 2025 Main
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Ref-Long: Benchmarking the Long-context Referencing Capability of Long-context Language Models

Junjie Wu*, Gefei Gu*, Yanan Zheng, Dit-Yan Yeung, Arman Cohan

EMNLP 2024 (Demo Track)
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TAIL: A Toolkit for Automatic and Realistic Long-Context Large Language Model Evaluation

Gefei Gu, Yilun Zhao, Ruoxi Ning, Yanan Zheng, Arman Cohan.

TAIL User Guide Feel free to use our toolkit!

Preprint
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BrainWave: A Brain Signal Foundation Model for Clinical Applications

Zhizhang Yuan, Fanqi Shen, Meng Li, Yuguo Yu, Gefei Gu, Fei Wu, Chenhao Tan, Yang Yang

🎖 Honors and Awards

  • 2023.10 Outstanding Student, Zhejiang University
  • 2023.10 First Prize Scholarship, Zhejiang University (Top 3%)

💻 Internships

  • 2023.07 - 2023.08, Ping An Insurance (Group) Company of China, Ltd
  • 2025.03 - 2025.07, Alibaba Inc.

🎹 Interesting Things!

  • Besides study and research, I am interested in Photography and Trading.