The model isn’t the hard part anymore. Deciding what you let it do is.

Give it the messy jobs: reading whatever someone typed in, guessing a category, cleaning up a name. It’s good at those and it’s fine if it’s a little off.

Then stop. Anything that needs the same answer every time should come from plain code. Ask a model for a number twice and you get two numbers, and now you can’t trust either one.

The model is the cheap part now. Knowing where to stop using it is the work.