Prompt
Draw a unicorn in TikZ code
The prompt
Draw a unicorn in TiKZ
Expected result
Valid TikZ/LaTeX source code that compiles into a recognizable (if simple) line-art unicorn.
Why it works
A famous minimal benchmark prompt (used in GPT-4's own system card) for testing whether a model can translate a visual concept into structurally correct vector-drawing code without ever having "seen" an image.