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Wo-Tao Yin

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#artificial intelligence Preprint Sep 2026

A Zeroth-Order Paradigm for LLM Preference Alignment

This paper proposes and analyzes Comparison-based Preference Optimization (ComPO), a zeroth-order alignment method based on comparison oracles, and establishes a convergence guarantee for its basic offline scheme under smoothness, gradient sparsity, and compatibility between the oracle and a latent objective.

Peter Chen, Xi Chen, Wo-Tao Yin et al. · 0 citations