On illuminarty.ai i find this tool that detect AI generated images, synthetic, tampered images and Deepfake. There's a Free version and some subscription plan. After a couple of test it actually showed somewhat accurated results:
.> 70% Chance on actual AI drawing tested
<20% On (human) edited images
<5% On original handmade drawings
EDIT - Not so great with realistic AI Photo. Somehow works better with AI art.
UPDATE - I find this one who works better on photo | Is It AI
vvvv Share your % results and pics to see more test vvv
I think this is just going to lead to a AI arms race with one team making AI to detect AI and the other team making AI to beat AI
It's literally how adversarial training works.