OpenAI: GPT-5.4 Mini wins on more metrics (7 of 8), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-5.4 Mini | OpenAI: o3 Pro |
|---|---|---|
| Intelligence Index | 23.3✓ | — |
| Coding Index | 25.3✓ | — |
| GPQA Diamond | 61% | 85%✓ |
| Design Arena Elo | — | — |
| Speed (tokens/sec) | 94✓ | — |
| Latency | 735ms✓ | — |
| Input price /M | $0.750✓ | $20.00 |
| Output price /M | $4.50✓ | $80.00 |
| Context window | 400K✓ | 200K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |