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Zhenghao Xu

9 papers hereh-index 583 citations14 works total

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

author position
  • first author4
  • middle author5

Across the 9 of 9 papers where every author was matched, so the position is known.

fields
  • cs.LG8
  • cs.CL1
same name
  • Zhenghao Xu — 1 paper, h 2
  • Zhenghao Xu — 1 paper, h 2

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

activity
20232026
most citedSample Complexity of Neural Policy Mirror Descent for Policy Optimization on Low-Dimensional Manifolds

1 citations · 1 across the 7 of their papers we have counts for

collaborators
Showing 2025Show all

4 papers · 1 filter

cs.CL2025

Self-Rewarding PPO: Aligning Large Language Models with Demonstrations Only

Qingru Zhang, Liang Qiu, Ilgee Hong +11

Supervised fine-tuning (SFT) has emerged as a crucial method for aligning large language models (LLMs) with human-annotated demonstrations. However, SFT, being an off-policy approa…

cs.LG2025

Ask a Strong LLM Judge when Your Reward Model is Uncertain

Zhenghao Xu, Qin Lu, Qingru Zhang +9

Reward model (RM) plays a pivotal role in reinforcement learning with human feedback (RLHF) for aligning large language models (LLMs). However, classical RMs trained on human prefe…

cs.LG2025

Think-RM: Enabling Long-Horizon Reasoning in Generative Reward Models

Ilgee Hong, Changlong Yu, Liang Qiu +8

Reinforcement learning from human feedback (RLHF) has become a powerful post-training paradigm for aligning large language models with human preferences. A core challenge in RLHF i…

cs.LG2025

COSMOS: A Hybrid Adaptive Optimizer for Memory-Efficient Training of LLMs

Liming Liu, Zhenghao Xu, Zixuan Zhang +5

Large Language Models (LLMs) have demonstrated remarkable success across various domains, yet their optimization remains a significant challenge due to the complex and high-dimensi…

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