OpenAI: GPT-5.4 Nano wins on more metrics (7 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Sonnet 4.6 | OpenAI: GPT-5.4 Nano |
|---|---|---|
| Intelligence Index | — | 38.2✓ |
| Coding Index | 43.0 | 43.9✓ |
| GPQA Diamond | 80% | 82%✓ |
| Design Arena Elo | 1327✓ | — |
| Speed (tokens/sec) | 46 | 68✓ |
| Latency | 1.2s | 458ms✓ |
| Input price /M | $3.00 | $0.200✓ |
| Output price /M | $15.00 | $1.25✓ |
| Context window | 1M✓ | 400K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |