It took a bit of prompt engineering but this worked for me in ChatGPT v4:
> Let's play hangman. I have thought of a 8 letter word, you have to guess it one guess at a time. You get to draw an ascii-art hangman too. Then YOU guess with a letter and I'll tell you if you were right or not. I won't give you a category clue. Start by drawing the hangman in a code block and then guessing a letter.
The same prompt against 3.5 didn't work - it didn't seem to be guessing likely next letters, and it couldn't keep track of how many body parts it should have drawn on the diagram.