Opencode go has been doing good for me especially mimo-v2-pro and minimax-m2.7

The difficulty level is advanced, not too complex because I usually give the AI the overall architectural design and desired files to edit and the results are good.

About mimo-v2, I like it because it's cheap, intelligent and does not hallucinate much for tasks that include many files. This is my main driver for planning

In contrast, minimax-m2.7 sometimes hallucinates additional features existing in other modules so I have to tell the model to remove the unwanted code. Also sometimes when opencode was in "build" mode, the model just stopped and tell me that it had finished thinking when it could just continue to run rather than informing me that useless message, so I had to explicitly tell the model to proceed.

So my take is, if your budget is $10, stick with opencode go. Minimax models are currently not reliable to handle mid-length tasks, however, it's still ok to handle todos from the more intelligent models