OpenAI releases tool to detect machine-written text

It offers a five-point scale of results: Very unlikely to have been AI-generated, unlikely, unclear, possible or likely. It works best on text samples greater than 1,000 words and in English, with performance significantly worse in other languages. And it doesn't work to distinguish computer code written by humans vs. AI. That said, OpenAI says the new tool is significantly better than a previous one it had released. It offers a five-point scale of results: Very unlikely to have been AI-generated, unlikely, unclear, possible or likely.