MoonshotAI: Kimi K2 Thinking wins on more metrics (7 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | MoonshotAI: Kimi K2 Thinking | OpenAI: GPT-5.4 Mini |
|---|---|---|
| Intelligence Index | 24.1✓ | 23.3 |
| Coding Index | 15.5 | 25.3✓ |
| GPQA Diamond | 71%✓ | 61% |
| Design Arena Elo | 1158✓ | — |
| Speed (tokens/sec) | 103✓ | 94 |
| Latency | 412ms✓ | 735ms |
| Input price /M | $0.600✓ | $0.750 |
| Output price /M | $2.50✓ | $4.50 |
| Context window | 262K | 400K✓ |
| Capabilities | ReasoningToolsJSON | ReasoningToolsJSONVision |