Jamba Large 1.6
Jamba Large 1.6 is the larger March 2025 instruction-following release. It uses 94 billion active parameters within a 398-billion-parameter hybrid network.
Deprecated API; check access details
Full-document evaluation was a release focus
The card reports results for CRAG, FinanceBench with full documents, HELMET LongQA and LongBench. It notes that some competitor measurements used different serving routes because of context limits.AI21-Jamba-Large-1.6 official model card
Practical guidance. Read those conditions before comparing scores. A model that receives a whole document is not necessarily being tested under the same input conditions as one with a shorter serving limit.
Weights support private deployment
AI21 introduced version 1.6 for deployment on a company's own premises or in its cloud account, as well as through AI21 Studio.AI21 introduces Jamba 1.6
The public card requires compatible CUDA hardware and describes quantization for the large checkpoint.AI21-Jamba-Large-1.6 official model card
The dated API is deprecated
AI21 lists jamba-large-1.6-2025-03 as deprecated.AI21 Jamba versions, aliases and API deprecations
Practical guidance. Existing self-hosted weights are a separate deployment. Large 1.7 is the next Large release to compare when replacing this checkpoint.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Status | Deprecated API; check access details |
| Launch date | |
| Access | Downloadable |
| Model identifiers | AI21-Jamba-Large-1.6jamba-large-1.6-2025-03 |
| Parameters | 398 billion total; 94 billion activeAI21-Jamba-Large-1.6 official model card |
| Context | 256K tokens advertisedAI21-Jamba-Large-1.6 official model card |
| Weight license | Jamba Open Model License; gated downloadAI21-Jamba-Large-1.6 official model card |
| AI21 API deprecation | 3 August 2025AI21 Jamba versions, aliases and API deprecations |
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