GPT-5.1 vs Mistral Large 2
OpenAI vs Mistral AI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 47.9)
- •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 | Mistral Large 2 | |
|---|---|---|
| Intelligence index | 89 | 47.9 |
| Developer | OpenAI | Mistral AI |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 128,000 tokens |
| Input price | $1.25 / 1M | $2.00 / 1M |
| Output price | $10.00 / 1M | $6.00 / 1M |
| Speed | 115 tok/s | 42 tok/s |
| Released | November 12, 2025 | July 24, 2024 |
| Parameters | — | 123B |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5.1
Mistral Large 2
AIME 2025
94
14
GPQA Diamond
88.1
48.6
Humanity’s Last Exam
26.5
4
LiveCodeBench
86.8
29.3
MMLU-Pro
87
69.7