I've been using it a lot to think through development builds. I'll tell it the architecture that i'm thinking, the tech stack, and go back and forth with it. It saves a lot of time and helps me think through my process. That's my main use case (with copilot to finish the deal). The token limits are a pain for full code generation.

I'm working on a site right now where I use the API to generate me full summaries of AI sites. Features, excerpts, descriptions. It works really nice. I find it works best when you split the prompts up.