architectures · ai21

Jamba 2.0 Architecture

Interleaved Mamba2 and full-attention transformer blocks with MoE FFN layers. Achieves Transformer quality with 50× KV-cache reduction for long documents.

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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	9c51c502ef60958e051825b36954a492b701dd842c4c2ee8448b125dc4bf0f17

Re-check this yourself → Source → Full record →

What is recorded

Publisher	ai21
Origin	Israel
Licence	Jamba-Open-Model
Modality	Text
Pulls recorded here	28,000

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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.