Since programming is predicted to become natural linguisized by the unstoppable advances in LLM technology, perhaps we can code golf LLMs themselves.
Produce the shortest question that is not an arithmetic problem (we know it sucks at multiplication problems) that produces an obvious falsehood from ChatGPT with screenshot as evidence.
Extra points if the error is reproducible by others (perhaps it was generated with low temperature), not one even a child would make, or is particularly hilarious.
Use GPT4 if you have access.