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N. Birkbeck

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#machine learning Preprint Oct 2026

MEND: RL For Flow Models via Proximal Velocity Matching

Reward post-training of flow models either reweights the model's own samples under a KL penalty or a frozen reference, often for thousands of updates, or backpropagates the reward and moves every sample without checking that the move is worth its size. We introduce MEND, a reinforcement learning method built on proxima...

Shreshth Saini, N. Birkbeck, Yi-Lin Wang et al. · 0 citations