Yeah it’s not easy to spot AI from a single image, but there’s a bunch of telltale signs on the guy’s links.

1. All of these kinds of images in his pages are within the last few months, once you get to more than a few months ago everything of his is mainly amateurish 3D model posing
2. This image doesn’t fit the styles of his other works and nothing on his page shows a progression from the art he was doing a few months ago to now
3. While he has a folder with “AI and WIPs” it looks to be almost exclusively AI and no actual WIPs of anything like the above picture
4. He doesn’t list AI on this but he doesn’t seem to tag things very well, mainly just listing “mixed media” for most of his works.

I know people jump to conclusions about AI a lot but aside from the picture looking a little wonky the “artist” does not seem to have a history of making art in this style or at this skill level

Edit: also forgot to mention, on his personal portfolio page he primarily just lists software works and has no art references whatsoever