A frog's chin has become the new standard for testing whether AI has culture or not. A developer came up with a ridiculous test : asking 14 mainstream large models to draw a 'frog with a Habsburg chin.' Each model gets three attempts per month, and by August, they've already run it 42 times. The 'Habsburg chin' is a real historical meme— The Habsburg royal family practiced close-relative marriages for hundreds of years to keep their bloodline 'pure,' which led to generations inheriting a signature prominent chin. The most famous example is Spanish King Charles II, whose protruding chin severely affected his ability to eat and speak. Getting AI to draw this essentially tests two things: whether it knows this historical trivia and whether it can translate it into an anatomically plausible SVG illustration. Compared to Charles II's portrait, Claude Opus 5 nailed the chin this time—protruding jaw, exposed teeth, and anatomical details were spot on; Gemini-3.6-flash took a different route, adding 65 comments in the SVG annotations and creatively giving the frog an 'imperial Habsburg crown' and 'Order of the Golden Fleece.' DeepSeek-v4-pro went with the same royal robe and crown idea, even humorously calling the chin a 'legendary Habsburg jaw.' It burned through 16,228 tokens in one run, making it the most expensive model of the month. On the other extreme, Mistral's large-2512 generated byte-for-byte identical SVGs in two out of three runs—so stable it’s almost boring. The entire dataset is publicly available, and the SVG source code for each run can be found on Hugging Face and GitHub. All the frogs were 'blindly drawn' by the models—no reference images, purely based on their understanding of the text. Website link https://frogs.vaguespac.es/