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Zi-Yuan Yang

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#natural language process... Preprint Sep 2026

You're Hired: Strategic Model Selection for LLM Collaboration

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...

Zong-Wan Cao, Zi-Yuan Yang, Shang-Bin Feng et al. · 0 citations
#machine learning Preprint Sep 2026

Save Your Saturated Data: Learning Beyond Reward Saturation in Group-Based RL

Group-relative reinforcement learning (RL) relies on reward variation among sampled responses to estimate informative relative advantages. As language models become increasingly capable, existing training data can become reward-saturated: all sampled responses to the same problem might receive equally high rewards, whe...

Zi-Yuan Yang, Yike Wang, Shang-Bin Feng et al. · 0 citations

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