Altman said in a statement accompanying the announcement, adding that the company is “building an age-prediction system to estimate age based on how people use ChatGPT.”

I suppose our theoretical teenager could get an account on, say, Grok and ask it to rephrase all of his prompts as if they were written by a 30-year-old and then send the output of that to ChatGPT. Let the models fight it out based on their profiles of what constitutes an adult.