MoonshotAI: Kimi K2.6 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | MoonshotAI: Kimi K2.6 | OpenAI: GPT-5.4 |
|---|---|---|
| Intelligence Index | — | 51.4✓ |
| Coding Index | 38.4 | 57.2✓ |
| GPQA Diamond | 79% | 92%✓ |
| Design Arena Elo | 1360✓ | 1301 |
| Speed (tokens/sec) | 151✓ | 59 |
| Latency | 348ms✓ | 933ms |
| Input price /M | $0.680✓ | $2.50 |
| Output price /M | $3.41✓ | $15.00 |
| Context window | 262K | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVision |