We're rolling out an age prediction model on ChatGPT consumer plans to help determine whether an account likely belongs to someone under 18, so we can apply the right experience and safeguards for teens.The model looks at a combination of behavioral and account-level signals, including how long an account has existed, typical times of day when someone is active, usage patterns over time, and a user’s stated age.If an adult is placed in the under-18 experience by mistake, they can quickly verify their age with a selfie through Persona, a verification service available in Settings > Account. Users can check whether safeguards have been added and verify at any time.