Devstral Small 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 45.3)
- •Devstral Small is cheaper ($0.10 vs $1.25 per 1M input)
- •Devstral Small is faster
| Devstral Small | GPT-5.1 | |
|---|---|---|
| Intelligence index | 45.3 | 89 |
| Developer | Mistral AI | OpenAI |
| Type | LLM | LLM |
| Access | — | API only |
| Context window | — | 400,000 tokens |
| Input price | $0.10 / 1M | $1.25 / 1M |
| Output price | $0.30 / 1M | $10.00 / 1M |
| Speed | 190 tok/s | 115 tok/s |
| Released | May 21, 2025 | November 12, 2025 |
| Parameters | — | — |
| Input modalities | — | Text, Image |
| Output modalities | — | Text |
Shared benchmarks
Devstral Small
GPT-5.1
AIME 2025
29.3
94
GPQA Diamond
43.4
88.1
Humanity’s Last Exam
4
26.5
LiveCodeBench
25.8
86.8
MMLU-Pro
63.2
87