OpenAI: GPT-5.5 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | OpenAI: GPT-5.5 | Xiaomi: MiMo-V2.5-Pro |
|---|---|---|
| Intelligence Index | 56.7✓ | 53.8 |
| Coding Index | 56.2✓ | 45.5 |
| GPQA Diamond | 93%✓ | 87% |
| Design Arena Elo | 1354✓ | 1334 |
| Speed (tokens/sec) | 29 | 30✓ |
| Latency | 2.8s | 256ms✓ |
| Input price /M | $5.00 | $0.435✓ |
| Output price /M | $30.00 | $0.870✓ |
| Context window | 1.1M✓ | 1.0M |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSON |