Anthropic: Claude Sonnet 5 and Google: Gemini 3.1 Pro Preview are evenly matched; the right pick depends on your priorities.
| Metric | Anthropic: Claude Sonnet 5 | Google: Gemini 3.1 Pro Preview |
|---|---|---|
| Intelligence Index | 53.4✓ | 46.5 |
| Coding Index | 71.5✓ | 68.8 |
| GPQA Diamond | 91% | 94%✓ |
| Design Arena Elo | 1330 | 1347✓ |
| Speed (tokens/sec) | 73 | 103✓ |
| Latency | 2.5s✓ | 2.8s |
| Input price /M | $2.00 | $2.00 |
| Output price /M | $10.00✓ | $12.00 |
| Context window | 1M | 1.0M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVisionAudio |