Was this written by AI? My experience, with the latest models, they do write code that looks correct/polished, but often do not fully solve the problem, or sol

Was this written by AI? My experience, with the latest models, they do write code that looks correct/polished, but often do not fully solve the problem, or solve the wrong thing, or introduce un-needed complexity. By often, I mean at least 10%-15%, which is still a high enough error rate, that you don't want to let loose in even a trivial service, let alone a service that is on the critical side. For now humans are absolutely needed in the loop.