GPT-5.1-Codex vs Mistral Small 3.1 24B Base
OpenAI vs Mistral AI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1-Codex has the higher intelligence index (88.2 vs 50.9)
- •Mistral Small 3.1 24B Base is cheaper ($0.10 vs $1.25 per 1M input)
- •GPT-5.1-Codex is faster
- •GPT-5.1-Codex has a larger context window (400K)
| GPT-5.1-Codex | Mistral Small 3.1 24B Base | |
|---|---|---|
| Intelligence index | 88.2 | 50.9 |
| Developer | OpenAI | Mistral AI |
| Type | Multimodal | Multimodal |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 128,000 tokens |
| Input price | $1.25 / 1M | $0.10 / 1M |
| Output price | $10.00 / 1M | $0.30 / 1M |
| Speed | 188 tok/s | 137 tok/s |
| Released | November 13, 2025 | March 17, 2025 |
| Parameters | — | 24000000000 |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.1-Codex
Mistral Small 3.1 24B Base
GPQA Diamond
86
37.5
MMLU-Pro
86
56