It's really gonna depend on the project. When my hobby project was greenfield, the AI was way better than I am. It was (still is) more knowledgable about the standards that govern the field and about low level interface details. It can shit out a bunch of code that relies on knowing these details in seconds/minutes, rather than hours/days.

Now that the project has grown and all that stuff is hammered out, it can't seem to consistently write code that compiles. It's very tunnel visioned on the specific file its generating, rather than where that fits in the context of what/how we're building what we're building.