I asked GPT4 to refactor a simple, working python script for my smart lights... and it completely butchered the code and apologized mid-generation.
No amount of pleading or correction would get it to function as it did just a week or two ago.
It is so over.
I had their plus plan for a while but with the speed it gets worse I got rid of it.
Nowadays latest model is without any doubt worse then what we had last year in December if you just regard answer quality.