architectures · ai21

Jamba

Hybrid Mamba-Transformer-MoE stack. Interleaves SSM and attention blocks for long-context efficiency.

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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	739b0738cc518ef9d46b6ee0a4578bc279c11e0d46f87b011b4cd2b799258959

Re-check this yourself → Source → Full record →

What is recorded

Publisher	ai21
Origin	Recorded as allied origin.
Licence	Apache-2.0
Pulls recorded here	22,001

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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.