I'm using it in three ways on a current project to reduce admin overhead for my company:

1. I've written a program that reconciles all my invoices against bank/cc transactions at the end of each quarter. My accountant otherwise has to do this by hand. It uses OpenAI's APIs to read the PDFs, parse out the invoicing party and amount(s), and as a fallback when classical NLP fails to parse dates.

2. I used GPT-4 to help write that tool using https://aider.chat/

3. I use Copilot to assist as well.

Originally I tried to use GPT-4 to do the reconciliation as well, but that was not successful. What worked better was getting it to write me a first cut fuzzy algorithm and then taking it from there.