OpenAI: GPT-5.4 wins on more metrics (6 of 8), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Opus 4.8 | OpenAI: GPT-5.4 |
|---|---|---|
| Intelligence Index | 61.4✓ | 56.8 |
| Coding Index | 56.7 | 57.2✓ |
| GPQA Diamond | 92% | 92% |
| Design Arena Elo | 1372✓ | 1303 |
| Speed (tokens/sec) | 59 | 62✓ |
| Latency | 1.8s | 982ms✓ |
| Input price /M | $5.00 | $2.50✓ |
| Output price /M | $25.00 | $15.00✓ |
| Context window | 1M | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |