system
A chat on subreddit /r/wallstreetbets
human
It is amazing... You can create portfolios and run them against economic events such as the 2008 market crash, minute by minute world news feed with ranked top stories, measuring tweets per minute by # and much more...

gpt
yeah, the data isn't good enough for quantitative/HFT work, but for normal people, it's great and provides a ton of tools/datasets