MoonshotAI: Kimi K2.7 Code wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | MoonshotAI: Kimi K2.7 Code | OpenAI: GPT-5.5 |
|---|---|---|
| Intelligence Index | 41.9✓ | — |
| Coding Index | 45.6 | 56.2✓ |
| GPQA Diamond | 90% | 93%✓ |
| Design Arena Elo | 1335 | 1351✓ |
| Speed (tokens/sec) | 150✓ | 40 |
| Latency | 644ms✓ | 4.1s |
| Input price /M | $0.740✓ | $5.00 |
| Output price /M | $3.50✓ | $30.00 |
| Context window | 262K | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |