GPT-5.2-Codex vs Mistral Small 4
OpenAI vs Mistral AI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.2-Codex has the higher intelligence index (89.9 vs 76.9)
- •Mistral Small 4 is cheaper ($0.15 vs $1.75 per 1M input)
- •Mistral Small 4 is faster
- •GPT-5.2-Codex has a larger context window (400K)
| GPT-5.2-Codex | Mistral Small 4 | |
|---|---|---|
| Intelligence index | 89.9 | 76.9 |
| Developer | OpenAI | Mistral AI |
| Type | Multimodal | Multimodal |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 262,144 tokens |
| Input price | $1.75 / 1M | $0.15 / 1M |
| Output price | $14.00 / 1M | $0.60 / 1M |
| Speed | 106 tok/s | 145 tok/s |
| Released | January 14, 2026 | March 16, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5.2-Codex
Mistral Small 4
GPQA Diamond
89.9
76.9
Humanity’s Last Exam
33.5
9.5