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What does Direct Preference Optimization (DPO) replace RLHF's reinforcement learning with?

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  1. A bigger reward model
  2. More human labelers
  3. A simple classification loss

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References

  1. Rafailov et al., Direct Preference Optimization (arXiv 2305.18290) arxiv.org/abs/2305.18290 Checked 2026-10-10.

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