OpenAI: GPT-5.4 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Google: Gemini 2.5 Pro | OpenAI: GPT-5.4 |
|---|---|---|
| Intelligence Index | 34.6 | 35.4✓ |
| Coding Index | 32.0 | 41.0✓ |
| GPQA Diamond | 84%✓ | 75% |
| Design Arena Elo | 1290 | 1303✓ |
| Speed (tokens/sec) | 99✓ | 40 |
| Latency | 1.1s | 855ms✓ |
| Input price /M | $1.25✓ | $2.50 |
| Output price /M | $10.00✓ | $15.00 |
| Context window | 1.0M | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVisionAudio | ReasoningToolsJSONVision |