Pengfei Yu

Applied Scientist, Amazon

Joined

July 2019

Names

Pengfei Yu

Emails

****@illinois.edu (Confirmed)

****@boson.ai (Confirmed)

****@gmail.com (Confirmed)

****@amazon.com (Confirmed)

Personal Links

Google Scholar

Semantic Scholar

ACL Anthology

Career & Education History

Applied Scientist

Amazon (amazon.com)

2025 – Present

Applied Scientist

Boson AI (boson.ai)

2024 – 2025

PhD student

Computer Science, University of Illinois at Urbana-Champaign (illinois.edu)

2019 – 2024

Undergrad student

Electronic Enginnering, Tsinghua University, Tsinghua University (tsinghua.edu.cn)

2015 – 2019

Advisors, Relations & Conflicts

PhD Advisor

Heng Ji

2019 – Present

Expertise

text generation

Present

Information extraction

knowledge graph

2017 – Present

Publications

OSExpert: Computer-Use Agents Learning Professional Skills via Exploration
Jiateng Liu, Zhenhailong Wang, Rushi Wang, Bingxuan Li, Jeonghwan Kim, Aditi Tiwari, Pengfei Yu, Denghui Zhang, Heng Ji
- MSLD 2026 Poster
- Readers: Everyone
The Law of Knowledge Overshadowing: Towards Understanding, Predicting, and Preventing LLM Hallucination
Yuji Zhang, Sha Li, Cheng Qian, Jiateng Liu, Pengfei Yu, Chi Han, Yi R. Fung, Kathleen McKeown, ChengXiang Zhai, Manling Li
- MSLD 2026 Poster
- Readers: Everyone
SABER: Small Actions, Big Errors — Safeguarding Mutating Steps in LLM Agents
Alejandro Cuadron, Pengfei Yu, Yang Liu, Arpit Gupta
- ICLR 2026 Workshop MemAgents
- Readers: Everyone
The Law of Knowledge Overshadowing: Towards Understanding, Predicting, and Preventing LLM Hallucination
Yuji Zhang, Sha Li, Cheng Qian, Jiateng Liu, Pengfei Yu, Chi Han, Yi R. Fung, Kathleen McKeown, ChengXiang Zhai, Manling Li, Heng Ji
- ACL 2025
- Readers: Everyone
SABER: Small Actions, Big Errors — Safeguarding Mutating Steps in LLM Agents
Alejandro Cuadron, Pengfei Yu, Yang Liu, Arpit Gupta
- Submitted to ICLR 2026
- Readers: Everyone
RPGBENCH: Evaluating Large Language Models as Role-Playing Game Engines
Pengfei Yu, Dongming Shen, Silin Meng, Jaewon Lee, Weisu Yin, Andrea Yaoyun Cui, Zhenlin Xu, Yi Zhu, Xingjian Shi, Mu Li, Alex Smola
- SEA @ NeurIPS 2025 Oral
- Readers: Everyone
Do Language Models Have Bayesian Brains? Distinguishing Stochastic and Deterministic Decision Patterns within Large Language Models
Andrea Yaoyun Cui, Pengfei Yu
- NeurIPS 2024 Workshop on Behavioral ML
- Readers: Everyone
RCOT: Detecting and Rectifying Factual Inconsistency in Reasoning by Reversing Chain-of-Thought
Tianci Xue, Ziqi Wang, Zhenhailong Wang, Chi Han, Pengfei Yu, Heng Ji
- ICLR 2024 Conference Withdrawn Submission
- Readers: Everyone
Exposure Bias Mitigation for Self Information Updating of Large Language Models
Pengfei Yu, Heng Ji
- ICLR 2024 Conference Withdrawn Submission
- Readers: Everyone
Defining a New NLP Playground
Sha Li, Chi Han, Pengfei Yu, Carl Edwards, Manling Li, Xingyao Wang, Yi Fung, Charles Yu, Joel R. Tetreault, Eduard Hovy, Heng Ji
- EMNLP 2023 Findings
- Readers: Everyone

View all 12 publications

Co-Authors

View all 44 co-authors