Jamba

Release history (7)

1. Jamba2 3B

   stableJan 15, 2026
   ai21labs/AI21-Jamba2-3B3B params256,000 ctx

   Open-source Jamba2.

2. Jamba2 Mini

   Current stableCutting edgestableJan 15, 2026
   ai21labs/AI21-Jamba2-Mini52B params256,000 ctx

   MoE 12B active / 52B total. Open-source.

3. Jamba Large 1.7

   stableAug 8, 2025
   ai21labs/AI21-Jamba-Large-1.7398B params256,000 ctx

   256K context.

4. Jamba 1.6 Large

   stableMar 13, 2025
   ai21labs/AI21-Jamba-Large-1.6398B params

   Refresh.

5. Jamba 1.5 Mini

   stableAug 22, 2024
   ai21labs/AI21-Jamba-1.5-Mini52B params

   1.5 Mini.

6. Jamba 1.5 Large

   stableAug 22, 2024
   ai21labs/AI21-Jamba-1.5-Large398B params

   398B MoE.

7. Jamba v0.1

   deprecatedMar 28, 2024
   ai21labs/Jamba-v0.152B params

   First Jamba.