HuggingFace opens its FineDNA recipe: mid-training on 300B tokens breaks the distillation ceiling

_lewtun · x · 2026-11-03

Lewis Tunstall of HuggingFace announces that the team's full mid-training and post-training recipe for FineDNA is now open, hoping the lessons on breaking past the distillation ceiling help model builders do the same in new domains.

A key caveat: none of this works unless the model already knows something about the domain. Off the shelf, Qwen3-14B gave a learning signal on only 17% of prompts; after mid-training on 300B tokens of DNA and text, that rose to 42%. The dataset is publicly released.

Related event: HuggingFace Open-Sources FineDNA Recipe, Bypassing Teacher Distillation(4 posts)→

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