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Pengfei Liu

2 papers hereh-index 4237 citations5 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • middle author1
  • last author1

Across the 2 of 2 papers where every author was matched, so the position is known.

fields
  • cs.CL2
same name
  • Pengfei Liu — 15 papers, h 7
  • Pengfei Liu — 14 papers, h 7
  • Pengfei Liu — 9 papers, h 5
  • Pengfei Liu — 6 papers, h 3
  • Pengfei Liu — 6 papers, h 2
  • Pengfei Liu — 5 papers, h 6

Either other researchers who publish under this name, or the same person where the external sources have not merged their records.

identity via Semantic Scholar / OpenAlex

collaborators
Showing cs.CLShow all

4 papers · 1 filter

cs.CL2025

On Evaluating LLM Alignment by Evaluating LLMs as Judges

Yixin Liu, Pengfei Liu, Arman Cohan

Alignment with human preferences is an important evaluation aspect of LLMs, requiring them to be helpful, honest, safe, and to precisely follow human instructions. Evaluating large…

cs.CL2025

Evaluating Mathematical Reasoning Beyond Accuracy

Shijie Xia, Xuefeng Li, Yixin Liu +2

The leaderboard of Large Language Models (LLMs) in mathematical tasks has been continuously updated. However, the majority of evaluations focus solely on the final results, neglect…

cs.CL2024

Understanding Reference Policies in Direct Preference Optimization

Yixin Liu, Pengfei Liu, Arman Cohan

Direct Preference Optimization (DPO) has become a widely used training method for the instruction fine-tuning of large language models (LLMs). In this work, we explore an under-inv…

cs.CL2024

Benchmarking Generation and Evaluation Capabilities of Large Language Models for Instruction Controllable Summarization

Yixin Liu, Alexander R. Fabbri, Jiawen Chen +7

While large language models (LLMs) can already achieve strong performance on standard generic summarization benchmarks, their performance on more complex summarization task setting…

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