I've been experimenting with Github agents recently, they use GPT-5 to write loads of code, and even make sure it compiles and "runs" before ending the task.

Then you go and run it and it's just garbage, yeah it's technically building and running "something", but often it's not anything like what you asked for, and it's splurged out so much code you can't even fix it.

Then I go and write it myself like the old days.