Author

Zhi-Ming Ma

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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

#machine learning Jun 2025

Any-Order GPT as Masked Diffusion Model: Decoupling Formulation and Architecture

It is shown decoder-only MDMs, despite a larger modeling space, can achieve significant inference speedups and comparable perplexity with techniques like temperature annealing, offering a path to reduced inference compute.

Shuchen Xue, Tianyu Xie, Tianyang Hu et al. · arXiv.org · 17 citations · ⚡1