Anthropic: Claude Opus 4.7 wins on more metrics (5 of 8), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Opus 4.7 | OpenAI: GPT-5.5 |
|---|---|---|
| Intelligence Index | 57.3✓ | 56.7 |
| Coding Index | 52.5 | 56.2✓ |
| GPQA Diamond | 91% | 93%✓ |
| Design Arena Elo | 1503✓ | 1354 |
| Speed (tokens/sec) | 63✓ | 36 |
| Latency | 1.6s✓ | 2.8s |
| Input price /M | $5.00 | $5.00 |
| Output price /M | $25.00✓ | $30.00 |
| Context window | 1M | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |