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AI21: Jamba 1.6 Large

ai21/jamba-1.6-large

Model weights

AI21 Jamba Large 1.6 is a high-performance hybrid foundation model combining State Space Models (Mamba) with Transformer attention mechanisms. Developed by AI21, it excels in extremely long-context handling (256K tokens), demonstrates superior inference efficiency (up to 2.5x faster than comparable models), and supports structured JSON output and tool-use capabilities. It has 94 billion active parameters (398 billion total), optimized quantization support (ExpertsInt8), and multilingual proficiency in languages such as English, Spanish, French, Portuguese, Italian, Dutch, German, Arabic, and Hebrew.

Usage of this model is subject to the Jamba Open Model License(opens in new tab).

Modalities

Context

256K

Released

Mar 13, 2025

Knowledge Cutoff

Aug 2024

About AI21: Jamba 1.6 Large

OpenRouter makes AI21: Jamba 1.6 Large available through a unified, OpenAI-compatible API using the model ID ai21/jamba-1.6-large.

AI21: Jamba 1.6 Large accepts text and returns text. It has a 256,000-token context window.

It was released on March 13, 2025; its knowledge cutoff is August 31, 2024.

More models from AI21

  • Jamba Large 1.7

Frequently asked questions

AI21 Jamba Large 1.6 is a high-performance hybrid foundation model combining State Space Models (Mamba) with Transformer attention mechanisms. Developed by AI21, it excels in extremely long-context handling (256K tokens), demonstrates superior inference efficiency (up to 2.5x faster than comparable models), and supports structured JSON output and tool-use capabilities.

Jamba 1.6 Large has a 256,000 token context window.

Jamba Large 1.7 is another text model from AI21.

Jamba 1.6 Large was released on March 13, 2025. Its knowledge cutoff is August 31, 2024.

ActivityFAQ

Activity

Token volume and request traffic to this model over time.