architectures · openai

OpenAI o-Series (Thinking) Architecture

Internal chain-of-thought reasoning via extended "thinking token" budget during inference. Uses private RLVR training signal.

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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	652e72d81b12b38dccaa31240f54c471517dbc1557e5b1e8efae4172ab20ed06

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What is recorded

Publisher	openai
Origin	United States
Licence	Proprietary
Modality	Text/Image/Code
Pulls recorded here	54,000

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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.