AI21 LabsJamba 1.7 Large
Jamba 1.7 Large is an AI21 Labs open-weights model, released 7 Jul 2025. Its best configuration ranks #634 of 785 on the BenchLeader Index at 41.3 ±1.8, in the lower half. The ± is the point: 271 other configurations score within that range, so they and this one cannot be told apart on quality alone — price and speed are what separate them. It scores highest in reasoning (41) and lowest in long context (34). Last measured 7 Jul 2025.stale: no new result in six months
- Blended price
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- Output speed
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- First answer
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- Context
- 256k
- Full answer
- –
- Cost per run
- –
- Released
- 7 Jul 2025
- Overall index41
- Reasoning41
- Agents & tools36
- Knowledge37
- Instruction following39
- Long context34
- Composite36
Versions
AI21 Labs has shipped 5 models under this name. Each is ranked on its own results; a newer version often has fewer results so far, which holds its index nearer the average until more arrive.
| Model | Released | Index | Rank |
|---|---|---|---|
| Jamba 1.7 Largethis page | 7 Jul 2025 | 41.3 | #634 |
| Jamba Large | 3 Jul 2025 | – | – |
| Jamba 1.5 Large | 22 Aug 2024 | 42.2 | #603 |
| Jamba Large 1.6 | – | 26.0 | #784 |
| Jamba Large 1.7 | – | – | – |
How its index has moved
9 Sept 2026 to 21 Oct 2026The index is recomputed from scratch every day, so a line moves when a new benchmark result lands, when a publisher revises a score, or when the models it is normalised against change. Early movement usually means the score is still settling.
Benchmark results
See all LLM benchmarks. One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.
Reasoning
| Benchmark | not stated | Source |
|---|---|---|
| GPQA Diamond (AA)not in index | 39.0%#483 | Artificial Analysis |
| Humanity's Last Exam (AA)not in index | 3.7%#577 | Artificial Analysis |
| CritPt | 0.0%#315 | Artificial Analysis |
Agents & tools
| Benchmark | not stated | Source |
|---|---|---|
| Terminal-Bench Hard | 2.3%#320 | Artificial Analysis |
| τ²-Bench Telecom (AA)not in index | 13.4%#369 | Artificial Analysis |
Knowledge
| Benchmark | not stated | Source |
|---|---|---|
| AA-Omniscience | -54.9#433 | Artificial Analysis |
| AA-Omniscience: accuracynot in index | 20.6%#296 | Artificial Analysis |
| AA-Omniscience: non-hallucinationnot in index | 4.9%#525 | Artificial Analysis |
Instruction following
| Benchmark | not stated | Source |
|---|---|---|
| IFBench | 35.2%#311 | Artificial Analysis |
Long context
| Benchmark | not stated | Source |
|---|---|---|
| AA-LCR | 19.3%#438 | Artificial Analysis |
Composite
| Benchmark | not stated | Source |
|---|---|---|
| AA Intelligence Index v4.3.2 | 6.1#541 | Artificial Analysis |
More from AI21 Labs
See also
Questions people ask
- What are Jamba 1.7 Large's benchmark scores?
- As of 25 Oct 2026, Jamba 1.7 Large scores 41.3 ±1.8 on the BenchLeader Index, strongest in reasoning (41) and weakest in long context (34). That rests on 6 independent benchmark results, and every score on this page links to its publisher.
- How does Jamba 1.7 Large rank?
- Jamba 1.7 Large is #634 of 785 ranked configurations on 25 Oct 2026. 271 other configurations score within its margin, so the exact position matters less than the band. The leader is Claude Opus 5.5 (max effort) at 72.6.
- When was Jamba 1.7 Large released?
- AI21 Labs released Jamba 1.7 Large on 7 Jul 2025.
Data as of 25 Oct 2026. Compare with another model.
Cite as: BenchLeader, “Jamba 1.7 Large: benchmarks, pricing, speed and rank”, data as of 25 Oct 2026, https://www.benchleader.com/models/jamba-1-7-large.