Direct Preference Optimization: Your Language Model is Secretly a Reward Model

Rafailov et al., 2023, Direct Preference Optimization (Advances in Neural Information Processing Systems 36 (NeurIPS 2023))

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6.3 Generalization to a new input distribution

  1. Did DPO generalize to a different input distribution?
    Applied to CNN/DailyMail news articles after training on Reddit TL;DR posts, DPO still beat the PPO policy clearly, even though PPO also used extra unlabeled Reddit prompts.

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