datasets · allenai

C4 (Colossal Clean Crawled Corpus)

Cleaned English CommonCrawl corpus introduced for T5. The canonical large-scale pretraining baseline.

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What this registry has checked

Quarantine. We hold the publisher’s own published hash for these weights and have recorded it against this entry. We have not downloaded and hashed the weights ourselves, so the hash is the publisher’s claim, not our measurement.

Weight file SHA-256	1e23d7562502d479bde72c1cc0546fb19ad86d07651b01284435e4a209b605e2

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What is recorded

Publisher	allenai
Origin	United States
Licence	ODC-By-1.0
Modality	text
Pulls recorded here	142,000

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Registry record as of 2026-06-06. Identity, licence and parameter count are properties of a release and do not move; tier can, and the verify link above re-checks it against the live registry rather than this page.