Google: Gemini 3.1 Pro Preview wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Google: Gemini 3.1 Pro Preview | OpenAI: GPT-5 |
|---|---|---|
| Intelligence Index | 41.3 | 42.0✓ |
| Coding Index | 39.4✓ | 38.9 |
| GPQA Diamond | 89%✓ | 84% |
| Design Arena Elo | 1345✓ | 1282 |
| Speed (tokens/sec) | 92✓ | 55 |
| Latency | 3.1s | 705ms✓ |
| Input price /M | $2.00 | $1.25✓ |
| Output price /M | $12.00 | $10.00✓ |
| Context window | 1.0M✓ | 400K |
| Capabilities | ReasoningToolsJSONVisionAudio | ReasoningToolsJSONVision |