This is because the users are training the product. They need training data, so they sell inference at the price of power.

Other thread (with many more comments): https://news.ycombinator.com/item?id=48282814

MiMo-V2.5 Series

Input (Cache Hit) Input (Cache Miss) Output mimo-v2.5-pro $0.0036 $0.435 $0.87

mimo-v2.5 $0.0028 $0.14 $0.28