GPT-5.1 vs Mistral Small 3.1
OpenAI vs Mistral AI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 42.4)
- •Mistral Small 3.1 is cheaper ($0.10 vs $1.25 per 1M input)
- •Mistral Small 3.1 is faster
| GPT-5.1 | Mistral Small 3.1 | |
|---|---|---|
| Intelligence index | 89 | 42.4 |
| Developer | OpenAI | Mistral AI |
| Type | LLM | LLM |
| Access | API only | — |
| Context window | 400,000 tokens | — |
| Input price | $1.25 / 1M | $0.10 / 1M |
| Output price | $10.00 / 1M | $0.20 / 1M |
| Speed | 115 tok/s | 134 tok/s |
| Released | November 12, 2025 | March 17, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.1
Mistral Small 3.1
AIME 2025
94
3.7
GPQA Diamond
88.1
45.4
Humanity’s Last Exam
26.5
4.8
LiveCodeBench
86.8
21.2
MMLU-Pro
87
65.9