PreviewDiff Enables Multimodal Critic-Guided Search in Diffusion Models
September 28, 2026
PreviewDiff implements a training-free test-time search that evaluates intermediate diffusion latents using a multimodal critic. This allows the model to repair trajectories during sampling rather than just selecting from completed outputs.
HOW THIS AFFECTS YOU
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researcherThis shifts diffusion optimization from scalar Best-of-N to latent-space search.
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designerExpect higher compositional fidelity in generated images and videos through guided sampling.