Model Comparison
Jamba 1.5 Large
vs. Gemini 3.1 Pro Preview
Comparing 2 AI models · 11 benchmarks · AI21 Labs, Google
Recommended Pick
Go Gemini 3.1 Pro Preview 7 metric wins Strongest on: Value, Throughput, Reasoning
Best Value
Gemini 3.1 Pro Preview
100.0 value score
65.3 reasoning / $4.50/1M
Lowest Price
Jamba 1.5 Large
$2.00/1M input price
Best Reasoning
Gemini 3.1 Pro Preview
65.3 reasoning score
Blends available reasoning benchmarks
Best for Coding
Gemini 3.1 Pro Preview
55.5 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Best value
Gemini 3.1 Pro Preview has the strongest quality-to-price mix at 100.0 out of 100 value points.
Reasoning gap
Gemini 3.1 Pro Preview leads Jamba 1.5 Large by 40.8 points on reasoning.
Top-pick rationale
Gemini 3.1 Pro Preview wins 7 measurable categories, including Value, Throughput, Reasoning, Intelligence.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Jamba 1.5 Large
AI21 Labs
TTFT
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Time
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tok/s
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Tokens
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Cost
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Gemini 3.1 Pro Preview
TTFT
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Time
—
tok/s
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Tokens
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Cost
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Which answer was more useful?
Full Comparison
| Metric | AI Jamba 1.5 Large | Top Pick Go Gemini 3.1 Pro Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $2.00/1M | $2.00/1M |
| Output Cost | $8.00/1M | $12.00/1M |
| Blended (3:1) | $3.50/1M | $4.50/1M |
| Specifications | ||
| Organization | AI21 Labs | |
| Release Date | Aug 22, 2024 | Feb 19, 2026 |
| Performance & Speed | ||
| Throughput | — | 134.8 tok/s |
| TTFT | — | 28648ms |
| Latency | — | 28648ms |
| Composite Indices | ||
| Value Score | 48.3 | 100.0 |
| Reasoning Score | 24.5 | 65.3 |
| Intelligence | 10.7 | 57.2 |
| Coding | — | 55.5 |
| Standard Benchmarks | ||
| GPQA | 42.7% | 94.1% |
| MMLU Pro | 57.2% | — |
| HLE | 4.0% | 44.7% |
| LiveCodeBench | 14.3% | — |
| MATH 500 | 60.6% | — |
| AIME (Original) | 4.7% | — |
| SciCode | 16.3% | 58.9% |
| LCR | — | 72.7% |
| IFBench | — | 77.1% |
| TAU-bench v2 | — | 95.6% |
| TerminalBench Hard | — | 53.8% |
Key Takeaways
Jamba 1.5 Large offers the best value at $2.00/1M, making it ideal for high-volume applications and cost-conscious projects.
Gemini 3.1 Pro Preview has the strongest reasoning profile with a 65.3 reasoning score, combining the available reasoning-heavy benchmarks.
Gemini 3.1 Pro Preview reaches a 55.5 coding index, making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens, suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Jamba 1.5 Large
- Cost-sensitive applications
- High-volume processing
Gemini 3.1 Pro Preview
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
