OpenAI: GPT-5.4 vs xAI: Grok 4.5
xAI: Grok 4.5 wins on more metrics (7 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-5.4 | xAI: Grok 4.5 |
|---|---|---|
| Intelligence Index | 51.4 | 53.8✓ |
| Coding Index | 71.1 | 72.4✓ |
| GPQA Diamond | 92% | 93%✓ |
| Design Arena Elo | 1237✓ | — |
| Speed (tokens/sec) | 53 | 74✓ |
| Latency | 874ms | 655ms✓ |
| Input price /M | $2.50 | $2.00✓ |
| Output price /M | $15.00 | $6.00✓ |
| Context window | 1.1M✓ | 500K |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |