Mistral: Mistral Medium 3.5 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Mistral: Mistral Medium 3.5 | OpenAI: o3 |
|---|---|---|
| Intelligence Index | 39.2✓ | 38.4 |
| Coding Index | 35.4 | 38.4✓ |
| GPQA Diamond | 75% | 83%✓ |
| Design Arena Elo | — | 1200✓ |
| Speed (tokens/sec) | 47 | 85✓ |
| Latency | 691ms✓ | 3.9s |
| Input price /M | $1.50✓ | $2.00 |
| Output price /M | $7.50✓ | $8.00 |
| Context window | 262K✓ | 200K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |