OpenAI: GPT-5.2-Codex and Xiaomi: MiMo-V2.5 are evenly matched; the right pick depends on your priorities.
| Metric | OpenAI: GPT-5.2-Codex | Xiaomi: MiMo-V2.5 |
|---|---|---|
| Intelligence Index | 49.0 | 49.0 |
| Coding Index | 43.0✓ | 42.1 |
| GPQA Diamond | 90%✓ | 85% |
| Design Arena Elo | 1188 | 1317✓ |
| Speed (tokens/sec) | 62✓ | 38 |
| Latency | 1.8s✓ | 2.8s |
| Input price /M | $1.75 | $0.140✓ |
| Output price /M | $14.00 | $0.280✓ |
| Context window | 400K | 1.0M✓ |
| Capabilities | ReasoningToolsJSONVision | ReasoningToolsJSONVisionAudio |