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20242026
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cs.CL2026

Why Multi-Step Tool-Use Reinforcement Learning Collapses and How Supervisory Signals Fix It

Yupu Hao, Zhuoran Jin, Huanxuan Liao +2

Tool use enables large language models (LLMs) to perform complex tasks, and recent agentic reinforcement learning (RL) methods show promise for enhancing model capabilities. Howeve…

cs.CL2026

Look Light, Think Heavy: What Multimodal Chain-of-Thought Reasoning Can and Cannot Do

Zhuoran Jin, Kejian Zhu, Hongbang Yuan +5

Chain-of-Thought (CoT) has become a standard method for improving reasoning capabilities in large language models (LLMs) by eliciting step-by-step thinking, but its effectiveness i…

cs.CL2026

Agentic Environment Engineering for Large Language Models: A Survey of Environment Modeling, Synthesis, Evaluation, and Application

Jiachun Li, Zhuoran Jin, Tianyi Men +12

Environments serve as interactive systems for large language model (LLM) based agents across diverse scenarios and play a crucial role in driving the continual evolution of model c…

cs.CL2026

Pushing the Limits of LLM Tool Calling via Experiential Knowledge Integration and Activation

Yupu Hao, Zhuoran Jin, Huanxuan Liao +2

Large language models (LLMs) rely on tool use to act as autonomous agents, yet often fail in multi-step execution due to insufficient tool-related knowledge and ineffective knowled…

cs.CL2025

Evaluating Personalized Tool-Augmented LLMs from the Perspectives of Personalization and Proactivity

Yupu Hao, Pengfei Cao, Zhuoran Jin +4

Personalized tool utilization is essential for aligning large language models (LLMs) with user preference in interaction scenarios with various tools. However, most of the current…

cs.CL2024

CITI: Enhancing Tool Utilizing Ability in Large Language Models without Sacrificing General Performance

Yupu Hao, Pengfei Cao, Zhuoran Jin +4

Tool learning enables the Large Language Models (LLMs) to interact with the external environment by invoking tools, enriching the accuracy and capability scope of LLMs. However, pr…