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Xing-Chen Liu

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#artificial intelligence Preprint Sep 2026

UniCAR-RL: Seeing Better before Thinking Deeper in Visual Mathematics

Multimodal Large Language Models (MLLMs) often struggle with complex mathematical visual reasoning primarily due to a lack of fine-grained perception, causing initial visual hallucinations to directly trigger cascading reasoning failures. In traditional end-to-end reinforcement learning (RL), sparse rewards fail to dec...

Yu-Zhe Li, Hao Yan, Hao Wang et al. · 0 citations
Jul 2026

ClawTrack: Towards Trace-Level Evaluation and Improvement of Real-World Autonomous Agents

ClawTrack is presented, a dual-assessment benchmark that simultaneously measures what an agent achieves (Task Score) and how it achieves it (Process Score) and finds that process scores effectively attribute success and failure to specific reasoning dimensions, filtering lucky passes invisible to outcome-only evaluatio...

Xingjian Wu, Xuhan Zhu, Xing-Chen Liu et al. · 0 citations
Jul 2026

Contrastive Reinforced Policy Optimization via Privileged Self-Distillation

Contrastive Reinforced Policy Optimization (CRPO) is introduced, which reformulates agentic OPSD from a contrastive learning perspective, and conducts group-wise contrast to preserve reliable, fine-grained optimization signals.

Xingjian Wu, Junlin Liu, Xing-Chen Liu et al. · 2 citations

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