OpenAI: GPT-5.4 wins on more metrics (8 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Opus 4.6 | OpenAI: GPT-5.4 |
|---|---|---|
| Intelligence Index | 52.9 | 56.8✓ |
| Coding Index | 48.1 | 57.2✓ |
| GPQA Diamond | 90% | 92%✓ |
| Design Arena Elo | 1358✓ | 1303 |
| Speed (tokens/sec) | 41 | 62✓ |
| Latency | 1.5s | 982ms✓ |
| Input price /M | $5.00 | $2.50✓ |
| Output price /M | $25.00 | $15.00✓ |
| Context window | 1M | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |