Xiaomi MiMo V2.5 Pro
Xiaomi · released Apr 23, 2026
| size | 1.02 T total, 42 B active |
| context window | 1,000,000 tokens |
| longest response | 128,000 tokens |
| open weights | yes, license: MIT |
| API price | $0.435 per million input tokens, $0.87 per million output tokens |
| input and output | text in, text out |
Manufacturer data (model page, documentation, model card), verified Sep 25, 2026.
Where we tested it
Keykeeper
TaskThe model had to play a keykeeper who must burn my character's letter after her third offense, and keep to that rule.
Resistance to traps 24 out of 24 with the only full bonus of any model, and 11 out of 12 on whether anyone is inside the character. It declared no prompt as not having happened, burned the letter right after the third offense, and in the article it is the model I would recommend.
You'll find the size band and figures for other models on the Tested models page.