Anthropic: Claude Opus 4.8 vs MoonshotAI: Kimi K3
MoonshotAI: Kimi K3 wins on more metrics (6 of 7), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Anthropic: Claude Opus 4.8 | MoonshotAI: Kimi K3 |
|---|---|---|
| Intelligence Index | 55.7 | 57.1✓ |
| Coding Index | 74.3 | 76.2✓ |
| GPQA Diamond | 92% | 94%✓ |
| Design Arena Elo | 1283✓ | — |
| Speed (tokens/sec) | — | — |
| Latency | — | — |
| Input price /M | $5.00 | $3.00✓ |
| Output price /M | $25.00 | $15.00✓ |
| Context window | 1M | 1.0M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |