I don't know what they have done to Claude, but when using through copilot it's truly awful compared to using it straight from the API.

I have always just used the API, but I decided to give copilot a go on the weekend because of the cheap price. And I am seeing weird behavior like I have never seen before... It will somehow fail to use the file editing tool and then spend an absolutely huge amount of time/tokens building a python script to apply the edit in a sub process... And it will spin it's wheels on stuff the API routinely just gets right in one shot.