my friend James tipped me off to using Notion AI.
basically, you can write/paste text into the Notion App, and use the AI rewrite feature:
I've mostly found "make shorter" and "improve writing" most helpful so far. But I want to try "summarize" and "explain this" soon.
the output requires more edits, but it's a nice assistant. I've used for tons of Slack posts/updates. I'm also starting to feed it documents.
I haven't actually been using ChatGPT for work (only for fun personal queries) but I want to hop on that too.