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Ivan Kruzhilov

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#small language model Preprint Aug 2026

Disentangling Optimization Scale from Preference Scale in DPO

This work shows that $\beta$ entangles two distinct roles: it governs the effective inverse preference-noise scale and simultaneously rescales the optimization dynamics, coupling this scale with the effective step size, and proposes a centered-softplus reformulation that is argmin-equivalent to DPO for $\beta>0$, while...

Ivan Kruzhilov · 0 citations