Zero-Data DPO: Crafting Rejected Responses via Random Prompts
natashajaques · x · 2026-07-07
Introduces a simple method that delivers significant performance gains across a range of benchmarks on fine-tuned models, requiring no extra data, labels, or supervision.
The approach constructs DPO preference pairs: the preferred response yc is generated using the real prompt x, while the rejected response yr is generated using a random prompt x'. The author will reveal more details on Wednesday.
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