OpenAI’s ChatGPT is too good for its own AI to detect

OpenAI has shut down Classifier, its AI tool to detect AI-written work, because of what we discovered at its launch: It stinks.

When OpenAI launched Classifier in January, it was supposed to have been smart enough to detect when a user (say, a student) used ChatGPT or another AI program to author a work. OpenAI pitched Classifier as a way for a teacher to identify if an essay, for example, had been authored by AI instead of as an original work.

But the tool struggled when we tested it, including identifying famous works as AI-authored. Instead of fixing the problems, OpenAI has…