I don't use AI for my mind map, but if you're actually trying to map your mind, I recommend against using a frontier model. I recommend seeding the mind map by hand using open formats (ie: something markdown or org based) and then slowly introducing AI tools to automate the high friction mechanical processes you bump into.

The reason I recommend against a frontier model is that any halfway decent model (like, single card consumer GPU level models) can automate the mechanical processes of this kind of tasking.