GPT-5.3-Codex vs Mistral Small 3.1 24B Instruct
OpenAI vs Mistral AI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.3-Codex has the higher intelligence index (91.5 vs 48)
| GPT-5.3-Codex | Mistral Small 3.1 24B Instruct | |
|---|---|---|
| Intelligence index | 91.5 | 48 |
| Developer | OpenAI | Mistral AI |
| Type | Multimodal | Multimodal |
| Access | API only | Open weights |
| Context window | 400,000 tokens | — |
| Input price | $1.75 / 1M | — |
| Output price | $14.00 / 1M | — |
| Speed | 73 tok/s | — |
| Released | February 24, 2026 | March 17, 2025 |
| Parameters | — | 24000000000 |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.3-Codex
Mistral Small 3.1 24B Instruct
GPQA Diamond
91.5
46