MoonshotAI: Kimi K2.6 wins on more metrics (6 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | MoonshotAI: Kimi K2.6 | OpenAI: GPT-5.1-Codex |
|---|---|---|
| Intelligence Index | 42.9 | 43.1✓ |
| Coding Index | 38.4✓ | 36.6 |
| GPQA Diamond | 79% | 86%✓ |
| Design Arena Elo | 1362✓ | 1218 |
| Speed (tokens/sec) | 137✓ | 39 |
| Latency | 356ms✓ | 2.4s |
| Input price /M | $0.680✓ | $1.25 |
| Output price /M | $3.41✓ | $10.00 |
| Context window | 262K | 400K✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |