GPT-5.1 vs Jamba 1.5 Large
OpenAI vs AI21 Labs — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 42.8)
- •GPT-5.1 is cheaper ($1.25 vs $2.00 per 1M input)
- •GPT-5.1 is faster
- •GPT-5.1 has a larger context window (400K)
| GPT-5.1 | Jamba 1.5 Large | |
|---|---|---|
| Intelligence index | 89 | 42.8 |
| Developer | OpenAI | AI21 Labs |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 256,000 tokens |
| Input price | $1.25 / 1M | $2.00 / 1M |
| Output price | $10.00 / 1M | $8.00 / 1M |
| Speed | 115 tok/s | 100 tok/s |
| Released | November 12, 2025 | August 22, 2024 |
| Parameters | — | 398000000000 |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.1
Jamba 1.5 Large
GPQA Diamond
88.1
36.9
Humanity’s Last Exam
26.5
4
LiveCodeBench
86.8
14.3
MMLU-Pro
87
53.5