Gefei(Frank) Gu 顾格非

CMU LTI, Pittsburgh, PA

I am currently a master’s student at Carnegie Mellon University in the Language Technologies Institute, working with Prof. Daniel Fried and Prof. Sean Welleck on efficient reasoning for language models and agents. 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.

Honors and Awards

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

News

Aug 01, 2025	Joining CMU as a master student!
Jul 15, 2025	Serving as a reviewer for EMNLP Demo Track.
Jun 20, 2025	One Paper (Product-Searcher) submitted to EMNLP Industry Track!
May 10, 2025	One Paper (Ref-long) accepted by ACL main!
Mar 01, 2025	Joining Alibaba Group as a Research Intern!

Selected publications

Industry Track

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

Gefei Gu^*, Wenhui Chen, Qiankun Shi, and 5 more authors

2025

Submitted to EMNLP Industry Track

ACL 2025

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

Junjie Wu^*, Gefei Gu^*, Yanan Zheng, and 2 more authors

arXiv preprint arXiv:2507.09506, 2025

Bib PDF

@article{wu2025ref,
  title = {Ref-Long: Benchmarking the Long-context Referencing Capability of Long-context Language Models},
  author = {Wu, Junjie and Gu, Gefei and Zheng, Yanan and Yeung, Dit-Yan and Cohan, Arman},
  journal = {arXiv preprint arXiv:2507.09506},
  year = {2025},
}

EMNLP 2024

TAIL: A Toolkit for Automatic and Realistic Long-Context Large Language Model Evaluation

Gefei Gu, Yilun Zhao, Ruoxi Ning, and 2 more authors

EMNLP 2024 (Demo Track), 2024

Bib HTML

@article{gu2024tail,
  title = {TAIL: A Toolkit for Automatic and Realistic Long-Context Large Language Model Evaluation},
  author = {Gu, Gefei and Zhao, Yilun and Ning, Ruoxi and Zheng, Yanan and Cohan, Arman},
  journal = {EMNLP 2024 (Demo Track)},
  year = {2024},
}

Preprint

BrainWave: A Brain Signal Foundation Model for Clinical Applications

Zhizhang Yuan, Fanqi Shen, Meng Li, and 5 more authors

arXiv preprint arXiv:2402.10251, 2024

Bib PDF

@article{yuan2024brainwave,
  title = {BrainWave: A Brain Signal Foundation Model for Clinical Applications},
  author = {Yuan, Zhizhang and Shen, Fanqi and Li, Meng and Yu, Yuguo and Gu, Gefei and Wu, Fei and Tan, Chenhao and Yang, Yang},
  journal = {arXiv preprint arXiv:2402.10251},
  year = {2024},
}