Matching upper and lower bounds on DPO policy optimality gap are derived that depend on a single design-dependent information matrix linking pair selection to estimation error and suboptimality.
arXiv preprint arXiv:2506.04272 , year=
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Which Pairs to Compare for LLM Post-Training?
Matching upper and lower bounds on DPO policy optimality gap are derived that depend on a single design-dependent information matrix linking pair selection to estimation error and suboptimality.