Just a few days ago, on Friday, my 15 year old son had his Claude account suspended with a demand for ID to prove he is 18 or older. He had his own Claude Max subscription (he out-earns me fairly frequently in his circle of gaming programmers), and was unaware Anthropic had a must-be-18 rule, as was I. Their email said "Our team found signals that your account was used by a child. This breaks our rules, so we paused your access to Claude." So I guess if you ever ask a question that seems to originate from a teen or less, expect to hit an ID gate.

So now he's a Codex user. OpenAI and Google both have a minimum age of 13.

EDIT: I should note that Anthropic gave him a refund for the whole month that was underway, despite him being nearing the end of it. So good on them.