Responsible AI

ChatGPT now guesses your age, and Australian under-18s get the restricted version by 8 September

OpenAI rolled out ChatGPT for Teens on 18 August 2026. Australian users under 18 will receive the restricted build by 8 September, six months after Australia's age-assurance law took effect.

ChatGPT now guesses your age, and Australian under-18s get the restricted version by 8 September

Key takeaways

  • OpenAI began rolling out ChatGPT for Teens on 18 August 2026; Australian users should have it by 8 September.
  • The build applies automatically to anyone who self-reports as 13 to 17, plus anyone OpenAI's age-prediction system flags as likely under 18, based on account signals rather than identity documents.
  • Civil penalties for age-assurance failures in Australia run to A$49.5 million per breach, giving the rollout direct regulatory weight.
  • A separate survey found 78% of young people had used an AI assistant, and 1 in 5 who did reported encountering something potentially harmful.
  • The restricted experience blocks romantic language, emotional dependence cues, and explicit content, and applies tighter handling around self-harm, violence, and substances.

What Happened

In-body image for: ChatGPT now guesses your age, and Australian under-18s get the restricted version by 8 September
Illustrative AI-generated image by Mindiam (Flux 1.1 Pro Ultra)

OpenAI started rolling out ChatGPT for Teens on 18 August 2026. The build becomes the default for anyone the company's systems estimate to be under 18, and Australian users should have it by 8 September.

The rollout applies to anyone who self-reports as 13 to 17, plus anyone the age-prediction system flags as likely under 18. OpenAI expects the global rollout to finish inside about three weeks. Existing accounts require no action: "There's no need for a teen to create a new account or change anything," the company stated.

The age-prediction model draws on "different signals linked to your account," including "general topics you talk about, the times of day you use ChatGPT, how and when your account is used, and how long your account has existed."


Why It Matters

Australia made age assurance a legal obligation for social media platforms, with civil penalties running to A$49.5 million per breach. The eSafety Commissioner administers those obligations. OpenAI's rollout arrives roughly six months after that framework took effect, and the age-prediction model is the mechanism that determines who receives the restricted build.

Survey data published alongside the rollout context illustrates the scale of the issue. Of young people surveyed, 78% had used an AI assistant. ChatGPT led at 70%, with Gemini and Copilot each at 20%. A further 8% had used a dedicated AI companion such as Character.AI, Anima or Chai. Of those users, 54% had gone to these tools for personal or social reasons: 33% asked for advice on a situation, 33% asked about physical health, 22% talked about feelings and challenges, and 20% asked about mental health. Separately, 1 in 5 children who used AI reported encountering something potentially harmful, covering controlling behaviour, hateful comments, harmful advice, offensive language and, for 5% of teenagers, sexual material.


Key Details

The teen experience includes a Study Mode that walks a user through a problem step by step using retrieval practice and self-explanation rather than providing a direct answer. Study Hours lets a teen or a parent schedule windows where Study Mode activates by default. Responsible homework reminders are designed to identify requests that amount to shortcuts and redirect them.

On the safety side, the Under-18 Model Spec tightens handling around self-harm and suicide, violence, disordered eating, dangerous activities and substances, age-restricted goods, and explicit or graphic sexual content. The spec also stops ChatGPT using romantic language, encouraging emotional dependence, or implying it is conscious.

OpenAI described its approach through several attributed statements. "We want teens to use AI responsibly to learn, create and explore. That means access should come with protections that reflect their developmental stage, reinforce relationships with trusted people in their lives and support healthy use over time," the company said. It also stated: "We've worked closely with experts to shape these features, guided by four commitments: put teen safety first, encourage real-world support, treat teens like teens, and be transparent about how our systems should behave."

On the question of ongoing work, OpenAI said: "Safety work is never finished; it's something we work on 24/7, 365 days a year."

The company also addressed tone: "We want to treat teens like teens, which means that we have to make sure that we're showing up with the right developmental stage when we're not either talking down to them or treating them like kids, but we're also making sure that they're not exposed to material that they shouldn't be exposed to."


Background and Context

Australia's age-assurance obligations for online platforms sit within a regulatory framework administered by the eSafety Commissioner. The social media age restrictions, which set 16 as the minimum age for social media access, came into force earlier in 2026 and carry the A$49.5 million per-breach penalty structure. OpenAI is not a social media platform under that specific definition, but the broader age-assurance environment shapes how AI companies operating in Australia approach under-18 users.

"Today's teens are digital natives and really the first generation growing up with AI," OpenAI noted in materials accompanying the rollout.


What Comes Next

OpenAI expects the global rollout of ChatGPT for Teens to complete within approximately three weeks of the 18 August launch date, placing Australian availability at or before 8 September. The company has not detailed how it will handle disputes where the age-prediction model misclassifies an adult as a minor, or vice versa.

The eSafety Commissioner's framework for social media age restrictions continues to develop, with industry codes and technical standards still being finalised as of mid-2026.

Sources & citations

  1. Alex Zaharov-Reutt, "ChatGPT now guesses your age, and Australian under-18s get the restricted version by 8 September," *iTWire*, 21 August 2026. Reported via itnews.com.au and iTWire editorial network. Source article:
  2. eSafety Commissioner, "Social media age restrictions," Australian Government
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