MoonshotAI: Kimi K3 vs OpenAI: GPT-5.6 Luna
OpenAI: GPT-5.6 Luna wins on more metrics (6 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | MoonshotAI: Kimi K3 | OpenAI: GPT-5.6 Luna |
|---|---|---|
| Intelligence Index | 57.1✓ | 51.2 |
| Coding Index | 76.2✓ | 71.4 |
| GPQA Diamond | 94%✓ | 91% |
| Design Arena Elo | — | 1266✓ |
| Speed (tokens/sec) | — | 96✓ |
| Latency | — | 1.8s✓ |
| Input price /M | $3.00 | $1.00✓ |
| Output price /M | $15.00 | $6.00✓ |
| Context window | 1.0M | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |