1. Write a static file server in Go
2. Write Go code to convert Color image to B/W
For both I got results. I know both are simple but still it's fascinating that AIs can write code. I have written more about it here https://rohanrd.xyz/posts/surprising-capability-of-ai-code-g...
Afterwards I asked it to add an option to "deep fry" the gif. Not only did it produce the correct code it also understood what I meant when referring to deep fried gifs. I was definitely impressed.
I haven't tried anything more advanced, but to go from simple requirements to solution without any clarification or even method signatures (It guessed the correct method signature down to the name and input params) was pretty dang impressive to me.