system
A chat on subreddit /r/wallstreetbets
human
Got it: short Google.
gpt
Google has their own version coming out "soon" called Sparrow. Reportedly the release has been delayed a few times because they're hung up on features that make it a better search bot (ie citing specific sources) and not just a chat bot that's good at answering questions.

First-to-market edge to ChatGPT but that name is terrible for marketing...