vs
0:1
overall capability wins (2 ties across 3 scored). Jamba Large 1.7 leads overall.
- Speed2:0
- Specs0:1
Verdict
Jamba 1.5 Large and Jamba Large 1.7 are closely matched on the overlapping metrics we have.
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- Jamba 1.5 Large
- $4
- Jamba Large 1.7
- $4
Price per 1M tokens
Full comparison
Organization
AI21
AI21
Family
Jamba
Jamba
License
Jamba Open Model
Jamba Open Model
Open weights
Yes
Yes
Release
Aug 29, 2024
Jul 8, 2025
Knowledge cutoff
-
-
API / provider
AI21
AI21
Modalities
text → text
text → text
Specs
Context window
256K
256K
Max output
4K
4K
Parameters
94B (12B act.)
398B (94B act.)
Pricing
Input $/1M
$2
$2
Output $/1M
$8
$8
Blended $/1M (3∶1)
$3.50
$3.50
Speed
tok/s
60
57
TTFT (s)
0.7
0.87
Reasoning
MMLU-Pro
57.2
—
GPQA Diamond
42.7
—
Humanity's Last Exam
4.1
—
AIME 2025
—
—
MATH-500
60.6
—
Humanity's Last Exam (with tools)
—
—
AA-Omniscience Accuracy
—
—
AA-LCR v1.1
—
—
CritPt
—
—
MMMU-Pro
—
—
IFBench
—
—
Chartography
—
—
Chartography (With Tools)
—
—
Coding
SWE-bench Verified
—
—
SWE-bench Pro
—
—
SWE-bench Multilingual
—
—
LiveCodeBench
14.3
—
Terminal-Bench 2.1
—
—
Aider Polyglot
—
—
Terminal-Bench 3
—
—
BigCodeBench
—
—
SciCode
16.3
—
CursorBench
—
—
SWE-Rebench
—
—
NL2Repo-Bench
—
—
DeepSWE
—
—
WebDev Arena
—
—
Terminal-Bench 4.0
—
—
CursorBench 4.0
—
—
FrontierCode v1.1 (Main)
—
—
Arena
LMArena Elo
1,289
—
| Metric | Jamba 1.5 Large | Jamba Large 1.7 | Delta |
|---|---|---|---|
| Identity | |||
| Organization | AI21 | AI21 | — |
| Family | Jamba | Jamba | — |
| License | Jamba Open Model | Jamba Open Model | — |
| Open weights | Yes | Yes | — |
| Release | Aug 29, 2024 | Jul 8, 2025 | — |
| Knowledge cutoff | - | - | — |
| API / provider | AI21 | AI21 | — |
| Modalities | text → text | text → text | — |
| Specs | |||
| Context window | 256K | 256K | tie |
| Max output | 4K | 4K | tie |
| Parameters | 94B (12B act.) | 398B (94B act.) | B +304 |
| Pricing | |||
| Input $/1M | $2 | $2 | tie |
| Output $/1M | $8 | $8 | tie |
| Blended $/1M (3∶1) | $3.50 | $3.50 | tie |
| Speed | |||
| tok/s | 60 | 57 | A +3.00 |
| TTFT (s) | 0.7 | 0.87 | A +0.17 |
| Reasoning | |||
| MMLU-Pro | 57.2 | — | — |
| GPQA Diamond | 42.7 | — | — |
| Humanity's Last Exam | 4.1 | — | — |
| AIME 2025 | — | — | — |
| MATH-500 | 60.6 | — | — |
| Humanity's Last Exam (with tools) | — | — | — |
| AA-Omniscience Accuracy | — | — | — |
| AA-LCR v1.1 | — | — | — |
| CritPt | — | — | — |
| MMMU-Pro | — | — | — |
| IFBench | — | — | — |
| Chartography | — | — | — |
| Chartography (With Tools) | — | — | — |
| Coding | |||
| SWE-bench Verified | — | — | — |
| SWE-bench Pro | — | — | — |
| SWE-bench Multilingual | — | — | — |
| LiveCodeBench | 14.3 | — | — |
| Terminal-Bench 2.1 | — | — | — |
| Aider Polyglot | — | — | — |
| Terminal-Bench 3 | — | — | — |
| BigCodeBench | — | — | — |
| SciCode | 16.3 | — | — |
| CursorBench | — | — | — |
| SWE-Rebench | — | — | — |
| NL2Repo-Bench | — | — | — |
| DeepSWE | — | — | — |
| WebDev Arena | — | — | — |
| Terminal-Bench 4.0 | — | — | — |
| CursorBench 4.0 | — | — | — |
| FrontierCode v1.1 (Main) | — | — | — |
| Arena | |||
| LMArena Elo | 1,289 | — | — |
Jamba 1.5 Large
- Context
- 256K / 4K out
- Parameters
- 94B (12B act.)
- Price
- $2 / $8
- Speed
- 60 tok/s · 0.7s TTFT
- Modalities
- text → text
- License
- Jamba Open Model
Hybrid Mamba-Transformer MoE (jamba-1.5-large) with open weights — 256K long-context predecessor to Jamba Large 1.7.
Jamba Large 1.7
- Context
- 256K / 4K out
- Parameters
- 398B (94B act.)
- Price
- $2 / $8
- Speed
- 57 tok/s · 0.87s TTFT
- Modalities
- text → text
- License
- Jamba Open Model
AI21's flagship hybrid Mamba-Transformer MoE — 256K context with efficient long-document inference versus pure attention stacks.
Benchmark charts
Winner bars are emphasized. Per-benchmark deltas sit above each chart.
These two models have no overlapping published benchmarks in our dataset. Compare specs and pricing instead.