Should AI be in your MVP v1, or added after the workflow works?

Seeing a lot of teams lately rush an LLM into the first version of every product. Model costs keep dropping, so it feels cheap to add. But cheap to call is not the same as cheap to get right.

The tradeoff cuts both ways. AI in v1 can make early feedback noisy, because you can't tell if users dislike the product or the model output. Adding it later can mean reworking the UX around it.

For regulated stuff (finance, health, compliance docs) I'd lean toward human in the loop first almost every time, just so there is a clean record of what the right answer was.

For whatever you're building right now, is the AI the actual hypothesis or more of a nice extra?