Honestly at this point I have fed this image in so many times on so many models, that it also functions as a test for "Are they training on my image specifically" (they are generally, for sure, but that's along with everything else in the ocean of info people dump in).

I genuinely don't think they are. GPT-5.2 still stands by 4 legs, and OAI has been getting this image consistently for over a year. And 3.1 still fumbled with the harder prompt "How many legs does the dog have?". I needed to add the "count carefully" part to tip it off that something was amiss.

Since it did well I'll make some other "extremely far out of the norm" images to see how it fairs. A spider with 10 legs or a fish with two side fins.