activity
20242026
most citedCooper: Co-Optimizing Policy and Reward Models in Reinforcement Learning for Large Language Models

1 citations · 3 across the 43 of their papers we have counts for

collaborators

52 papers

cs.CL2026

Agent-R: Scaling Agents for Realistic Productivity Work via Real-Source Data Synthesis

Teng Pan, Zixuan Wang, Yuchen Yan +5

Large language models have made rapid progress in agentic reasoning and tool use, raising expectations for agents that can take over realistic productivity work from humans. Howeve…

cs.AI2026

KnowGPO: Knowledge-Grouped Policy Optimization for Search Agents

Siqi Chen, Zhengxi Lu, Yuchen Yan +10

Deep search agents solve knowledge-intensive tasks through long-horizon, multi-turn interactions, where assigning credit to individual search decisions is fundamentally difficult.…

cs.CV2026

WorldMemBench: A Comprehensive Benchmark for Memory of Video World Models

Nan Zhou, Jianxiong Gao, Qiuyu Wang +10

As video models enable longer and more realistic interactive experiences, maintaining a world consistent with its history becomes essential. This requires both preserving previousl…

cs.CV2026

ComputerSD: Online Self-Distillation from Real-Time Feedback for Computer-Use Agents

Yong Du, Tongbo Chen, Zhengxi Lu +5

Online training enables computer-use agents (CUAs) to improve through interaction with executable environments. However, existing methods primarily rely on sparse outcome rewards,…

cs.CV2026

HybridCUA: Learning to Orchestrate GUI and CLI for Computer-Use Agents

Tongbo Chen, Junbo Niu, Zhengxi Lu +8

Computer use agents (CUAs) have demonstrated strong capabilities in completing digital tasks. However, existing CUAs either rely solely on graphical user interface (GUI) interactio…

cs.CL2026

RetireOPD: Self-Retiring On-Policy Distillation for Agentic Reinforcement Learning

Yan Yu, Zhengxi Lu, Yizhou Liu +8

Multi-turn agents trained with reinforcement learning (RL) receive a single scalar reward per trajectory, which motivates self on-policy distillation (OPD) to supply dense token-le…

cs.CV2026

Learning from Reliable Negatives: Confidence-Anchored Test-Time Adaptation for GUI Grounding

Yizhou Liu, Fei Tang, Yuchen Yan +8

Graphical User Interface (GUI) grounding is essential for autonomous agents to map natural language instructions to precise screen coordinates. However, existing supervised fine-tu…

cs.CL2026

When Metrics Reward the Worst Translations: Internalizing Cultural Reasoning for Social Media Translation Evaluation

Yiwen Qiu, Linjuan Wu, Dingming Li +7

Automatic translation quality metrics trained on general-domain corpora systematically fail on social media content, where communicative intent is encoded in culturally loaded expr…

cs.CL2026

PaperGym: Rubric-Centered Evolution for Research-Plan Generation

Yuhan Wang, Zhengxi Lu, Yuchen Yan +6

Research planning is the decisive capability of AI scientists. Yet a research plan admits no verifiable answer, so reinforcement learning lacks the environment it requires: tasks p…

cs.CL2026

TTPO: Test-Time Policy Optimization

Aozhe Wang, Zhengxi Lu, Jianze Wang +8

Recent prominent post-training methods, such as Reinforcement Learning (RL) and On-Policy Self-Distillation (OPSD), have driven rapid progress in mathematical reasoning for large l…

cs.CL2026

BrowserForge: Scaling Web Episode via Parallel Browser Sandboxes

Fei Tang, Huawen Shen, Zhiqiong Lu +7

Web agents that act from rendered pixels avoid the fragility and heavy token cost of reading a page's HTML or accessibility tree, but training them depends on large amounts of high…

cs.AI2026

Agent-G: Gaussian Guidance for Agentic Reinforcement Learning

Zixuan Wang, Yanrui Miao, Zhengxi Lu +6

Hint-based reinforcement learning addresses reward sparsity in long-horizon agentic tasks by retaining a prefix of an expert trajectory before each rollout, letting the policy expl…

cs.AI2026

AgentOPSD: Recursive Self-Distillation for Agentic Reinforcement Learning

Zi-Han Wang, Zhengxi Lu, Zhiyuan Yao +10

Reinforcement learning (RL) with verifiable rewards constructs trajectory-level advantage estimates, yet it often fails to credit the few pivotal decisions that determine outcomes…

cs.LG2026

SkillRise: Agentic Reinforcement Learning for Cross-Task Skill Evolution

Zhiyuan Yao, Yuxin Chen, Zhengxi Lu +13

Large language model agents often encounter related yet distinct tasks that share reusable solution patterns. Yet standard agentic reinforcement learning treats tasks as independen…

cs.CL2026

Pass the Baton: Trajectory-Relayed On-Policy Distillation

Haolei Xu, Xiaowen Xu, Haiwen Hong +5

On-policy distillation (OPD) grounds token-level supervision in the student's own trajectory, yet suffers from prefix failure: once the student commits to a wrong reasoning directi…

cs.RO2026

VLA-Corrector: Lightweight Detect-and-Correct Inference for Adaptive Action Horizon

Yi Pan, Miao Pan, Qi Lu +8

Vision-Language-Action (VLA) foundation models have recently achieved strong progress in embodied intelligence. To reduce policy-call frequency while preserving temporal coherence,…

cs.CV2026

Perceive-to-Reason: Decoupling Perception and Reasoning for Fine-Grained Visual Reasoning

Hongxing Li, Xiufeng Huang, Dingming Li +11

Fine-grained visual reasoning remains challenging for vision-language models, especially when small but critical visual cues are buried in high-resolution images. Existing approach…

cs.CL2026

Beyond Literal Translation: Evaluating Cultural Effectiveness in Social Media UGC

Linjuan Wu, Ruiqi Zhang, Xinze Lyu +7

Social media platforms enable large-scale cross-lingual communication, but translating user-generated content (UGC) remains challenging due to its informal style, cultural referenc…

cs.LG2026

SKILL0: In-Context Agentic Reinforcement Learning for Skill Internalization

Zhengxi Lu, Zhiyuan Yao, Jinyang Wu +7

Agent skills, structured packages of procedural knowledge and executable resources that agents dynamically load at inference time, have become a reliable mechanism for augmenting L…

cs.LG2026

Self-Distilled Agentic Reinforcement Learning

Zhengxi Lu, Zhiyuan Yao, Zhuowen Han +8

Reinforcement learning (RL) has emerged as a central paradigm for post-training LLM agents, yet its trajectory-level reward signal provides only coarse supervision for long-horizon…

cs.CL2026

Milestone-Guided Policy Learning for Long-Horizon Language Agents

Zixuan Wang, Yuchen Yan, Hongxing Li +7

While long-horizon agentic tasks require language agents to perform dozens of sequential decisions, training such agents with reinforcement learning remains challenging. We identif…

cs.CL2026

Language as a Latent Variable for Reasoning Optimization

Linjuan Wu, Haoran Wei, Jialong Tang +4

As LLMs reduce English-centric bias, a surprising trend emerges: non-English responses sometimes outperform English on reasoning tasks. We hypothesize that language functions as a…

cs.CL2026

Pause or Fabricate? Training Language Models for Grounded Reasoning

Yiwen Qiu, Linjuan Wu, Yizhou Liu +9

Large language models have achieved remarkable progress on complex reasoning tasks. However, they often implicitly fabricate information when inputs are incomplete, producing confi…

cs.CV2026

SpatialEvo: Self-Evolving Spatial Intelligence via Deterministic Geometric Environments

Dinging Li, Yingxiu Zhao, Xinrui Cheng +16

Spatial reasoning over three-dimensional scenes is a core capability for embodied intelligence, yet continuous model improvement remains bottlenecked by the cost of geometric annot…