@anke @neilk It's an AI. basic maths, like counting in this case, is something humans learn in kindergarten.
OpenAI has been, in a totally Elon-Musk-esque style promising that they have AGI just around the corner (it's OpenAI's FSD fantasy).
The media/industry presents ChatGPT as a tool that can reason, e.g. develop software. Then it stands to argue that it can count. One-off errors are ugly and common.
And obviously, it cannot do basic maths. Not even stuff some animals sometime manage.