Technically not ChatGPT, but GPT4 directly via the API. And I also told my boss about it ;) I used it as baseline for a few translations, had it generate some boilerplate, and create classes in multiple languages from some JSON. But most of the time I have no need it can fulfill, and most of the (tiny) bill OpenAI sends me is from me using it for personal stuff like getting an idea what to do for our wedding anniversary (the boat ride was a great idea :D), or as a funny bot in two twitch chats I moderate (I use 3.5 there because it’s over an order of magnitude cheaper).