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 | Anthropic: Claude Fable 5 | Google: Gemini 3.1 Pro Preview |
|---|---|---|
| Intelligence Index | 64.9✓ | 41.3 |
| Coding Index | 62.0✓ | 39.4 |
| GPQA Diamond | 93%✓ | 89% |
| Design Arena Elo | 1417✓ | 1345 |
| Speed (tokens/sec) | — | 89✓ |
| Latency | — | 3.4s✓ |
| Input price /M | $10.00 | $2.00✓ |
| Output price /M | $50.00 | $12.00✓ |
| Context window | 1M | 1.0M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVisionAudio |