# AI21-Jamba-Large-1.5 [Canonical model page](https://headlessthrones.com/models/ai21-labs-ai21-jamba-large-1-5) · [Model library](https://headlessthrones.com/models) Public catalog reference from Headless Thrones. Exact catalog ID: `ai21-labs-ai21-jamba-large-1-5`. Catalog source-check date: 2026-10-23. This brief contains the public catalog answers and any catalog guide, not private drafts, historical editorial revisions or independently measured rankings. The canonical HTML page may also display separately published editorial. Current catalog answers ## What to know about AI21-Jamba-Large-1.5 AI-compiled from linked model documentation. This is a catalog reference, not an independent performance review. Catalog checked October 23, 2026. [Exact model](https://headlessthrones.com/models/ai21-labs-ai21-jamba-large-1-5#model-answer-identity) · [Access](https://headlessthrones.com/models/ai21-labs-ai21-jamba-large-1-5#model-answer-access) · [Inputs & outputs](https://headlessthrones.com/models/ai21-labs-ai21-jamba-large-1-5#model-answer-modalities) · [License](https://headlessthrones.com/models/ai21-labs-ai21-jamba-large-1-5#model-answer-license) · [Weight details](https://headlessthrones.com/models/ai21-labs-ai21-jamba-large-1-5#model-answer-repository) ### Which AI21-Jamba-Large-1.5 does this page describe? AI21-Jamba-Large-1.5 is a model record from **AI21 Labs** in the Jamba family. [Source](https://huggingface.co/ai21labs/AI21-Jamba-Large-1.5) A separate version identifier is not documented in this record; the model name alone does not establish which snapshot a service runs. ### How can you access AI21-Jamba-Large-1.5? The catalog documents **API and Open weights** access for AI21-Jamba-Large-1.5. [Source](https://docs.ai21.com/docs/jamba-foundation-models) As of the catalog check, this version was marked deprecated. [Source](https://docs.ai21.com/docs/jamba-foundation-models) Check the linked lifecycle information before starting a new integration. For API use, confirm the exact model identifier, your account and region, and the endpoint's current limits in the linked documentation. An API listing does not establish access through a consumer subscription. Open weights means the model weights are distributed for use under their stated terms. It does not establish a hosted API, an open-source license, or a hardware requirement. This record documents API access separately. ### What can AI21-Jamba-Large-1.5 receive and generate? Documented inputs: **text**. [Source](https://huggingface.co/ai21labs/AI21-Jamba-Large-1.5) Documented outputs: **text**. [Source](https://huggingface.co/ai21labs/AI21-Jamba-Large-1.5) Input support and output generation are separate capabilities. Reading an image does not establish image generation; a text output listing does not establish speech output. File sizes, formats and media limits depend on the documented implementation. ### What license is recorded for AI21-Jamba-Large-1.5? The recorded license label is **jamba-open-model-license**. [Source](https://huggingface.co/ai21labs/AI21-Jamba-Large-1.5) Read the linked license and associated use terms for this exact version before redistribution, commercial deployment or fine-tuning. A label alone does not establish every permission, restriction or obligation, and it does not determine the terms of a separate hosted service. ### What is documented about the AI21-Jamba-Large-1.5 checkpoint? This evidence refers to `ai21labs/AI21-Jamba-Large-1.5` at recorded revision `57d0bbccd09d9f56fb8ad2c3f2353ef61717f906`, checked October 23, 2026. [Repository metadata](https://huggingface.co/api/models/ai21labs/AI21-Jamba-Large-1.5) Safetensors metadata records **398,555,145,696 stored parameters**. This is a stored-weight count, not necessarily the number activated per token, a download size or a GPU-memory requirement. [Repository metadata](https://huggingface.co/api/models/ai21labs/AI21-Jamba-Large-1.5) Recorded architecture class: `JambaForCausalLM`. [Repository metadata](https://huggingface.co/api/models/ai21labs/AI21-Jamba-Large-1.5) Repository task tag: `text-generation`. A task tag identifies a distribution category; it does not measure performance on that task. [Repository metadata](https://huggingface.co/api/models/ai21labs/AI21-Jamba-Large-1.5) Repository language labels: en, fr, de, nl, es, pt, it, ar, and he. These labels are not independent evaluations of language quality. [Repository metadata](https://huggingface.co/api/models/ai21labs/AI21-Jamba-Large-1.5) Repository access gate: `auto`. This records the repository's gate setting when checked; licensing and use terms still apply. [Repository metadata](https://huggingface.co/api/models/ai21labs/AI21-Jamba-Large-1.5) Read the retrieved model card for setup and qualifications. [Model card](https://huggingface.co/ai21labs/AI21-Jamba-Large-1.5/resolve/57d0bbccd09d9f56fb8ad2c3f2353ef61717f906/README.md) **Catalog qualifications:** Official publisher model repository; listed status confirms a catalog entry, not a verified hosted API service. The model card could not be retrieved anonymously; only public publisher metadata was used. Remaining fields need verification. API lifecycle is separate from downloadable weights. The shared vendor overview gives inconsistent knowledge/training recency statements, so no family-wide cutoff is copied into this version. [Source 1](https://huggingface.co/api/models/ai21labs/AI21-Jamba-Large-1.5) · [Source 2](https://huggingface.co/ai21labs/AI21-Jamba-Large-1.5/resolve/57d0bbccd09d9f56fb8ad2c3f2353ef61717f906/README.md) **Evidence still missing here:** complete input/output pricing, context or input capacity, knowledge and training-data cutoffs, and tested hardware requirements. Missing documentation is not evidence that a feature is unavailable. Headless Thrones has not independently benchmarked this model for this reference. Evaluate it on representative work before choosing it; these facts do not rank its accuracy, reliability, speed or suitability against another model. Keep the exact version in view ## Other Jamba models from AI21 Labs. These are separate records in the same publisher family. A shared family name does not establish equal capabilities or interchangeable licenses. ### [AI21-Jamba-Large-1.7](https://headlessthrones.com/models/ai21-labs-ai21-jamba-large-1-7) API · Open weights · 256,000 context tokens ### [AI21-Jamba2-3B](https://headlessthrones.com/models/ai21-labs-ai21-jamba2-3b) Open weights · 256,000 context tokens ### [AI21-Jamba2-Mini](https://headlessthrones.com/models/ai21-labs-ai21-jamba2-mini) API · Open weights · 256,000 context tokens ### [AI21-Jamba-Large-1.6](https://headlessthrones.com/models/ai21-labs-ai21-jamba-large-1-6) API · Open weights ### [AI21-Jamba-Mini-1.5](https://headlessthrones.com/models/ai21-labs-ai21-jamba-mini-1-5) API · Open weights ### [AI21-Jamba-Mini-1.6](https://headlessthrones.com/models/ai21-labs-ai21-jamba-mini-1-6) API · Open weights