Jamba Large
Summary
Jamba Large is an open-weight language model from AI21 Labs, released on 1 Jul 2025. It accepts text and generates text, with a 256K-token context window and up to 4K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $2 per million input tokens and $8 per million output tokens (AI21 Studio), across 1 provider we track.
AI21's hybrid SSM-Transformer long-context model for enterprise agents and grounded generation
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | AI21 Labs |
|---|---|
| Release date | 1 Jul 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Open weights [models.dev] |
| Context window | 256K (256,000 tokens) [models.dev] |
| Max output | 4K tokens [models.dev] |
| Knowledge cutoff | 22 Aug 2024 [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
Jamba Large API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| AI21 Studio jamba-large | $2 | $8 | – | 256K | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of Jamba Large?
Jamba Large has a context window of 256,000 tokens (256K) and can generate up to 4,096 tokens in a single response, according to models.dev.
How much does the Jamba Large API cost?
Through AI21 Studio, Jamba Large costs $2 per million input tokens and $8 per million output tokens. Prices last verified 4 Oct 2026.
Is Jamba Large open source?
Jamba Large is an open-weight model. Check the license terms before commercial use.
When was Jamba Large released?
AI21 Labs released Jamba Large on 1 Jul 2025, according to models.dev.
Change history
No changes detected since we started tracking this model. We re-check every source daily.