PBPO: Prefix-Block Policy Optimization for Diffusion Language Models
Trains diffusion language models with policy updates conditioned on completed prefix blocks. Applies importance weights and clipping to individual tokens within each block, avoiding the unstable product of all token ratios.
First public: · Added to this list: November 9, 2026
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Alternative generation methods — Change how intermediate steps are generated, revised, or searched—for example, by refining several steps in parallel. Some produce written chains of thought.