Hummingbird-V2
Copyright 2026 Hummingbird contributors

The Hummingbird-V2 model package is licensed under the Apache License, Version 2.0.
Third-party training datasets retain their own terms. The release includes attribution
and provenance in TRAINING_DATA.md and training/corpus_contract.yaml.

The training mix includes material from FineWeb-Edu, SmolLM-Corpus
(FineWeb-Edu-Dedup and Cosmopedia v2), FineMath, DCLM baseline 1.0,
Dolma 3 Dolmino, and FinePDFs-Edu. The corpus contract records the pinned
source revisions and the dataset licenses declared for this training run.