OpenAI: GPT-5.4 Nano wins on more metrics (7 of 7), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-5 Pro | OpenAI: GPT-5.4 Nano |
|---|---|---|
| Intelligence Index | — | 44.0✓ |
| Coding Index | — | 43.9✓ |
| GPQA Diamond | — | 82%✓ |
| Design Arena Elo | — | — |
| Speed (tokens/sec) | — | 67✓ |
| Latency | — | 551ms✓ |
| Input price /M | $15.00 | $0.200✓ |
| Output price /M | $120.00 | $1.25✓ |
| Context window | 400K | 400K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |