OpenAI Expands GPT-5.6 Luna Access for Free Users

Core News & Key Facts

OpenAI has announced a major ChatGPT update that expands access to its latest models and introduces new controls for reasoning. GPT-5.6 Luna will become the default model for Free and Go users this week, while the company is also expanding free access with unlimited text conversations and a new Think button.

The Think button is designed for questions that need deeper reasoning. When activated, users can give the model additional time to work through complicated problems instead of relying only on a quick response. Unlimited text chats are scheduled to arrive for Free users next week, although OpenAI says abuse guardrails will continue to apply.

For Plus and Pro subscribers, OpenAI is updating GPT-5.6 Sol with a focus on more accurate and better-targeted responses. The model has been adjusted to adapt its level of detail to the question, use tighter formatting and avoid unnecessary information. It is also designed to correct users when appropriate rather than simply agreeing with incorrect assumptions.

Context & Statements

According to OpenAI's update, the improved GPT-5.6 Sol is intended to reduce factual mistakes, particularly in areas involving dates, numbers, sources, rules and assumptions. Plus and Pro users will also receive a new reasoning slider across ChatGPT's web, mobile and desktop experiences, giving them greater control over how much reasoning the model uses.

The updated GPT-5.6 Sol is intended for everyday ChatGPT conversations. OpenAI clarified that the versions of GPT-5.6 Sol used in Work and Codex are not changing as part of this particular update.

The company is also introducing additional safeguards for users it believes may be under 18. These measures cover areas including romantic roleplay, sexual content, age-restricted challenges and goods, eating disorders, body-image concerns, dangerous activities and graphic violence. OpenAI says it has added evaluations for model performance with younger users and trained the system to encourage teenagers to seek support from trusted people when appropriate.

Impact & What's Next

The changes give Free and Go users broader access to ChatGPT's reasoning capabilities without requiring a paid subscription, while subscribers receive more control over how GPT-5.6 Sol responds to complex requests.

However, unlimited text chats do not mean unlimited access to every ChatGPT feature. OpenAI says limits will continue to apply to file uploads, image generation and other tools.

The rollout is therefore focused on making everyday text-based ChatGPT use more accessible while giving paid users additional control and accuracy improvements. Free users can expect the Think button and unlimited text conversations from next week, as the updated experience continues rolling out.