Google: Gemini 2.5 Pro 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-5.2 |
|---|---|---|
| Intelligence Index | 34.6 | 46.6✓ |
| Coding Index | 32.0 | 44.2✓ |
| GPQA Diamond | 84% | 86%✓ |
| Design Arena Elo | 1290✓ | 1264 |
| Speed (tokens/sec) | 99✓ | 47 |
| Latency | 1.8s | 1.3s✓ |
| Input price /M | $1.25✓ | $1.75 |
| Output price /M | $10.00✓ | $14.00 |
| Context window | 1.0M✓ | 400K |
| Capabilities | ReasoningToolsJSONVisionAudio | ReasoningToolsJSONVision |