Did you watch the livestream?
They literally sent it 1) an a screenshot of the Discord session they were in and 2) an audience submitted image
It described the Discord image in incredible detail, including what was in that, what channels they subscribed to, how many users were there. And for the audience image, it correctly described it as an astronaut on an alien planet, with a spaceship on a distant hill.
And that image looked like it was AI created!
These aren't images it's been "trained on".