A unified theory of offline RLHF shows that loss curvature and data coverage control suboptimality, explaining why squared-loss IPO is more stable than logistic-loss DPO.
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Design Considerations in Offline Preference-based RL
A unified theory of offline RLHF shows that loss curvature and data coverage control suboptimality, explaining why squared-loss IPO is more stable than logistic-loss DPO.