AI21 Labs · Released Jul 1, 2025Jamba Large
AI21's hybrid SSM-Transformer long-context model for enterprise agents and grounded generation.
- Capability
- —No ECI score yet
- Input
- $2.00per 1M tokens
- Output
- $8.00per 1M tokens
- Context
- 256K4K max output
What it costs
- Input
- $2.00per million tokens
- Output
- $8.00per million tokens
- Blended (3:1)
- $3.50pricier than 80% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $8.00 |
| Team assistant25M input + 5M output tokens | $90.00 |
| Production app250M input + 50M output tokens | $900.00 |
Official AI21 Labs API price, as listed on models.dev.
Independent benchmarks
Epoch AI has not published a Capabilities Index score for Jamba Large yet.
The details
- Lab
- AI21 Labs
- Released
- Jul 1, 2025
- Knowledge cutoff
- Aug 22, 2024
- Context window
- 256,000 tokens
- Max output
- 4,096 tokens
- Inputs
- Text
- Output
- Text
- Reasoning
- No
- Tool calling
- Yes
- Structured output
- Yes
- Weights
- Open weights
- API model ID
jamba-largeon AI21 Labs- Availability
- 1 API providerlisted on models.dev
More from AI21 Labs
About Jamba Large
How much does Jamba Large cost?
Jamba Large costs $2.00 input / $8.00 output per million tokens (official AI21 Labs API price). At a 3:1 input-to-output mix that is $3.50 per million tokens, more expensive than 80% of the 360 priced models we track.
What is the context window of Jamba Large?
Jamba Large accepts up to 256,000 tokens per request and can write up to 4,096 tokens in one response.
How good is Jamba Large?
Epoch AI has not published a Capabilities Index score for Jamba Large yet.
Is Jamba Large open source?
Yes. AI21 Labs publishes the weights, so it can be downloaded and self-hosted.
What inputs does Jamba Large support?
Jamba Large accepts text and replies in text. It is not a dedicated reasoning model, supports tool calling and can return structured JSON output.
When was Jamba Large released?
AI21 Labs released Jamba Large on Jul 1, 2025. Its training data runs to Aug 22, 2024.
What are the best alternatives to Jamba Large?
The closest current models from other labs on capability, price and release date are GPT-5 Chat (OpenAI, $1.25 / $10.00), Command A Vision (Cohere, $2.50 / $10.00), Gemini 2.5 Computer Use Preview (Google, $1.25 / $10.00) and Pixtral Large (25.02) (Mistral AI, $2.00 / $6.00).