The sooner Chinese labs catch up the better it is for all of us, even if you don't use their models, as they're the ones who define the baseline capability that cannot be taken away from you (no one is going to limit/remove access to an LLM if you can get equivalent/better unrestricted access from Chinese open-weight models).
In some ways, more impressive than GPT 5.5 with high(!) thinking. GPT says quite some nonsense from time to time; didn't see any sign of this in MiMo so far, which is a pretty wild difference.