I use it with the documentation of what I'm building.
Paste in the relevant section of the developer docs, ask it to write a function, or ask it to produce a valid API request, etc.
I suppose it's like a junior dev in a sense but it's very fast, can correct its own mistakes if you point them out, and has an internet worth of knowledge about various approaches and troubleshooting techniques.
I find most people who don't see value haven't actually used GPT-4 yet. Have you?
I'm just amazed by the reactions on this post. From the HN crowd I was, wongly, expecting very different opinions.
For coding, are you using it like a pairing with a junior developer or more like a search engine for documentation?