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News/$\xi$-DPO: Direct Preference Optimization via Ratio Reward Margin
arxiv
PublishedOctober 28, 2026 at 4:00 AM

$\xi$-DPO: Direct Preference Optimization via Ratio Reward Margin

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arXiv:2605.10981v2 Announce Type: replace Abstract: Reference-free preference optimization has emerged as an efficient alternative to reinforcement learning from human feedback, with Simple Preference Optimization(SimPO) demonstrating strong performance by eliminating the explicit reference model th

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