xAI: Grok 4.3 wins on more metrics (6 of 8), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Opus 4.6 | xAI: Grok 4.3 |
|---|---|---|
| Intelligence Index | 52.9 | 53.2✓ |
| Coding Index | 48.1✓ | 41.0 |
| GPQA Diamond | 90% | 90%✓ |
| Design Arena Elo | 1358✓ | 1255 |
| Speed (tokens/sec) | 52 | 150✓ |
| Latency | 1.0s | 638ms✓ |
| Input price /M | $5.00 | $1.25✓ |
| Output price /M | $25.00 | $2.50✓ |
| Context window | 1M | 1M |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |