Reproduce “The Shape of the DPO Hyperparameter Landscape: What to Measure, How It Moves with Scale, and When Not to Transfer It” on OpenResearch

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About this paper

Hannan Mahadik, David Salinas, Jacek Golebiowski, Aaron Klein

The authors map how learning rate and β affect DPO post-training across Qwen3 models, datasets, and evaluation goals. Minimum-validation-loss choices have mean normalized regret of 0.50 for static, 0.62 for chat, and 0.53 overall. Rankings also transfer unreliably across scales and datasets, supporting retuning on the target setup; the dataset comparison tests only Dolci-Instruct-DPO and UltraFeedback.

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