AI21 Labs, open weights
Jamba Large
Jamba Large by AI21 Labs has 2 published benchmark results on Noometry, not yet enough to be ranked. API pricing starts at $2 per million input tokens and $8 per million output tokens, with a 256K-token context window.
Last verified
Specifications
- Noometry rank
- Unranked
- Index score
- Not ranked
- Evidence
- Sparse 2 results
- Provider
- AI21 Labs
- Released
- July 1, 2025
- Weights
- Open weights
- Reasoning
- No
- Context window
- 256K
- Max output
- 4K
- Input price
- $2 / M
- Output price
- $8 / M
- Blended price
- $3.50 / M
- Output speed
- 36 tokens/s Kagi
- Value
- Not ranked
- Knowledge cutoff
- August 2024
- Input
- text
Category scores
Each category score combines every public result we have in that category.
- Reasoning 18.0
- Knowledge 37.7
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Benchmark results
Every published result we track, with its source. Bold rows are the ones used for ranking; where several exist we prefer independent runs over self-reported numbers.
Reasoning
| Benchmark | Score | Position | Setting | Source | Date |
|---|---|---|---|---|---|
| Kagi LLM Benchmark | 26.1% | #95 of 99, top 96% | Kagi LLM Benchmark |
Knowledge
| Benchmark | Score | Position | Setting | Source | Date |
|---|---|---|---|---|---|
| Vectara Hallucination Rate (lower is better) | 9.7% | #53 of 96, top 56% | Vectara Hallucination Leaderboard |
API pricing by provider
| Route | Input $/M | Output $/M | Cached input $/M | Checked |
|---|---|---|---|---|
| ai21 | $2 | $8 | — | 2026-10-10 |
Compare Jamba Large
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Frequently asked questions
How good is Jamba Large?
Jamba Large by AI21 Labs has 2 published benchmark results on Noometry, not yet enough to be ranked. API pricing starts at $2 per million input tokens and $8 per million output tokens, with a 256K-token context window.
How much does Jamba Large cost?
Jamba Large costs $2 per million input tokens and $8 per million output tokens on AI21 Labs's own API.
What is Jamba Large's context window?
Jamba Large accepts up to 256K tokens of input and can write up to 4K tokens in one response.
Is Jamba Large open source?
Yes. Jamba Large's weights are downloadable; check the license for commercial terms.
How fast is Jamba Large?
Jamba Large generated about 36 output tokens per second in the Kagi LLM Benchmark's timed runs. Speed varies by provider, load and reasoning effort.