MoonshotAI: Kimi K2.6 wins on more metrics (5 of 8), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | MoonshotAI: Kimi K2.6 | OpenAI: GPT-5.5 |
|---|---|---|
| Intelligence Index | — | — |
| Coding Index | 38.4 | 56.2✓ |
| GPQA Diamond | 79% | 93%✓ |
| Design Arena Elo | 1360✓ | 1351 |
| Speed (tokens/sec) | 147✓ | 39 |
| Latency | 368ms✓ | 3.4s |
| Input price /M | $0.680✓ | $5.00 |
| Output price /M | $3.41✓ | $30.00 |
| Context window | 262K | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |