Hello! I am currently a Ph.D. student at the Institute of Computing Technology, Chinese Academy of Sciences, advised by Prof. Fei Sun and Prof. Yuanzhuo Wang.

My research interests include:

• Uncertainty Estimation in LLMs
• Hallucination Detection and Mitigation
• Retrieval-Augmented LLMs

News

• 2025.8: Our paper Too Consistent to Detect: A Study of Self-Consistent Errors in LLMs accepted at EMNLP 2025 Main! 🎉

Publication

• [📄EMNLP 2025 Main] Too Consistent to Detect: A Study of Self-Consistent Errors in LLMs. Hexiang Tan, Fei Sun, Sha Liu, etc.
  🔗PDF
• [📄ACL 2024 Main] Blinded by Generated Contexts: How Language Models Merge Generated and Retrieved Contexts for Open-Domain QA?. Hexiang Tan, Fei Sun, Wanli Yang, Yuanzhuo Wang, Qi Cao, Xueqi Cheng
  🔗[Website] [ACL2024] [PDF]
• [📄Preprint 2024] A Survey on LLM-as-a-Judge. Jiawei Gu, Xuhui Jiang, Zhichao Shi, Hexiang Tan, Xuehao Zhai, etc.
  🔗[Arxiv]
• [📄SIGIR 2025] Fact-Level Confidence Calibration and Self-Correction. Yige Yuan, Bingbing Xu, Hexiang Tan, Fei Sun, Teng Xiao, Wei Li, etc.
  🔗[PDF]
• [📄NAACL 2025 Findings] PRDetect: Perturbation-Robust LLM-generated Text Detection Based on Syntax Tree. Xiang Li, Zhiyi yin, Hexiang Tan, Shaoling Jing, Du Su, Jie Zhang, Fei Sun, etc.
  🔗[PDF]