Devstral Small 2 vs GPT-5.1
Mistral AI vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 47.5)
- •Devstral Small 2 is cheaper ($0.00 vs $1.25 per 1M input)
- •GPT-5.1 is faster
| Devstral Small 2 | GPT-5.1 | |
|---|---|---|
| Intelligence index | 47.5 | 89 |
| Developer | Mistral AI | OpenAI |
| Type | LLM | LLM |
| Access | — | API only |
| Context window | — | 400,000 tokens |
| Input price | $0.00 / 1M | $1.25 / 1M |
| Output price | $0.00 / 1M | $10.00 / 1M |
| Speed | 62 tok/s | 115 tok/s |
| Released | December 9, 2025 | November 12, 2025 |
| Parameters | — | — |
| Input modalities | — | Text, Image |
| Output modalities | — | Text |
Shared benchmarks
Devstral Small 2
GPT-5.1
AIME 2025
34.3
94
GPQA Diamond
53.2
88.1
Humanity’s Last Exam
3.4
26.5
LiveCodeBench
34.8
86.8
MMLU-Pro
67.8
87