I’m guessing ChatGPT. I spy a couple suspicious artifacts that suggest it’s AI, and the style is very close to the O4 model outputs. Happy to be proven wrong though, if someone has a source.
But it looks.... different, maybe this is an AI upscaling?
I see the original further down but how can you tell?? I couldn't tell at first but now I see some weird things about this one. But also the face of the cat is nicer in this one? And the composition is more balanced with the pile of paper in the bottom left?
ai yuck