FMRG is a training-free single-trajectory guidance framework for flow-based models that matches or exceeds baselines on reward-guided tasks and inverse problems using as few as 3 NFEs.
Steering diffusion models with quadratic rewards: a fine-grained analysis, February 2026
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Extends score relations for tilted distributions to constant negative diagonal tilts by linking denoisers via Tweedie's formula, yielding location and time shifts in the score operator.
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How to Guide Your Flow: Few-Step Alignment via Flow Map Reward Guidance
FMRG is a training-free single-trajectory guidance framework for flow-based models that matches or exceeds baselines on reward-guided tasks and inverse problems using as few as 3 NFEs.
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Technical Note on Relating Scores of Tilted Distributions
Extends score relations for tilted distributions to constant negative diagonal tilts by linking denoisers via Tweedie's formula, yielding location and time shifts in the score operator.