Why Policy Gradients Are Missing in Diffusion Models
kalomaze · x · 2026-08-02
A developer pointed out that in areas utilizing continuous regression, policy gradients (PG) are typically absent. The most prominent example is diffusion models, where practically no one applies PG-like reinforcement learning algorithms.
The main exception might be research from teams like ByteDance, who are exploring branchgrpo-style methods using in-house VLM reward models.
Related event: Policy Gradient in Diffusion Models Sparks Debate(3 posts)→
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