I told GPT-4 to write the code for a small 4-wheeled robot to act as a Roomba-like device. It wrote the MicroPython code for doing so (I did not know that the project existed). Bought the board (I was using Arduino), re-hooked everything together, and got it to work as expected on the second try. It even created what I believe it is a kind of memory module for long-term storage of my dorm's shape, so the robot has memorized and optimized the cleaning routes on itself.

Not bad for 3 mins of prompting