GPT-5.1-Codex vs Magistral Medium
OpenAI vs Mistral AI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1-Codex has the higher intelligence index (88.2 vs 62.9)
| GPT-5.1-Codex | Magistral Medium | |
|---|---|---|
| Intelligence index | 88.2 | 62.9 |
| Developer | OpenAI | Mistral AI |
| Type | Multimodal | Multimodal |
| Access | API only | Open weights |
| Context window | 400,000 tokens | — |
| Input price | $1.25 / 1M | — |
| Output price | $10.00 / 1M | — |
| Speed | 188 tok/s | — |
| Released | November 13, 2025 | June 10, 2025 |
| Parameters | — | 24000000000 |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.1-Codex
Magistral Medium
AIME 2025
95.7
64.9
GPQA Diamond
86
70.8
Humanity’s Last Exam
23.4
9
LiveCodeBench
84.9
50.3