Author

Yichen Li

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#machine learning Sep 2025

Advantage Weighted Matching: Aligning RL with Pretraining in Diffusion Models

This work establishes a novel theoretical analysis: DDPO is an implicit form of score/flow matching with noisy targets, which increases variance and slows convergence, and introduces Advantage Weighted Matching (AWM), a policy-gradient method for diffusion.

Shuchen Xue, Chongjian Ge, Shilong Zhang et al. · arXiv.org · 52 citations · ⚡11