Authors

Lucy Lu Wang

Publications 2

Preprint Open access

HERA: Harness-Environment Co-Evolution for Reliable Agentic Abstention

Han Luo, Bingbing Wen, Guang Yang et al. · 2026

Large language model (LLM) agents are increasingly capable of acting in complex tool-use environments, yet they often fail to recognize when tasks are infeasible and no valid solution exists. Recent work has formalized this reliability gap as the problem of agentic abstention, and existing approaches typically optimize …

Preprint Open access

You're Hired: Strategic Model Selection for LLM Collaboration

Zongwan Cao, Ziyuan Yang, Shangbin Feng et al. · 2026

While multi-agent and model collaboration algorithms gain traction to combine the strengths of diverse Large Language Models (LLMs), existing systems remain bottlenecked on pre-defined and hand-crafted model pools. In this work, we investigate the problem of model selection in multi-LLM systems. We propose and systemat …

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