OpenAI: GPT-5.4 wins on more metrics (7 of 8), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Sonnet 4.6 | OpenAI: GPT-5.4 |
|---|---|---|
| Intelligence Index | 42.6 | 56.8✓ |
| Coding Index | 43.0 | 57.2✓ |
| GPQA Diamond | 80% | 92%✓ |
| Design Arena Elo | 1329✓ | 1304 |
| Speed (tokens/sec) | 44 | 67✓ |
| Latency | 1.3s | 999ms✓ |
| Input price /M | $3.00 | $2.50✓ |
| Output price /M | $15.00 | $15.00 |
| Context window | 1M | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |