I have always heard that dopers are consistently ahead of testing regimes. I don’t think it is easier to tell than AI, which always seems pretty obvious to me.

You have to consider that any AI content worthy of the Oscar shortlist is going to be very high-quality, and likely intensely hand/human-tweaked in the first place. It's not from the general population of all AI content out there.

> I have always heard that dopers are consistently ahead of testing regimes

I don't know about that, even the very biggest names with the most funding quite often get dinged for it. I suppose I'm not really saying that the detection rate for doping is high, though, just that it's much higher than AI detection in high-quality content (which I would suggest is approximately zero).