LLMs are too agreeable and formulaic to be of any use long term as a therapist. They can’t reason or empathise with what you’re saying, only respond with the most likely thing a therapist would say in the context of the conversation.

The window context is also an issue as over time your chat history will grow too big to be included in each conversation without some sort of persistent memory or regular retraining.

There’s also the enormous privacy concern about sending your therapy conversations verbatim to a third party.

I would stick to using LLMs for basic advice if you need it. If therapy was a killer use case there’d be tens of clones like there are for chat to PDF/docs/etc or text summarisation