SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is expanding access to ChatGPT for Free and Go users by eliminating text chat restrictions under GPT-5.6 Luna. The company confirmed that unlimited text interactions will be available starting next week, with safeguards against misuse still in place. During this rollout, Luna is also becoming the default model for these plans. Additionally, Free users will soon see a Think button, which enables the model to dedicate extra time for reasoning on more complex questions before providing a response.
This increased allowance applies specifically to standard text conversations, leaving limits on features like image generation, file uploads, and other tools that require additional computing resources. OpenAI stated that the Think button will accompany the launch of unlimited text access next week, allowing users to activate it when a question requires deeper reasoning. This update broadens the core conversational capabilities of ChatGPT for Free and Go accounts, while separate limits still apply to other tools and services.
GPT-5.6 comprises multiple models, including Luna, Sol, and Terra, each tailored to different performance needs. Luna is the fastest and most cost-effective option within the series. According to OpenAI, approximately one billion people now use ChatGPT every week for activities such as research, planning, writing, and searching. As part of this update, Luna will serve as the primary ChatGPT model for Free and Go users, while other GPT-5.6 models remain accessible within various products and plans designed for different workloads and levels of access.
Free access is expanded; tool restrictions stay in place
Subscribers of ChatGPT Plus and Pro are now receiving an upgraded GPT-5.6 Sol model, suitable for routine tasks and more intricate reasoning. The company explained that Sol now offers more precise answers and minimizes unnecessary detail when brief responses suffice. Paid plans also include a reasoning slider available on web, mobile, and desktop platforms, allowing users to control the amount of processing applied to each request. This feature is useful for activities like research, coding, writing, and planning, which demand different levels of reasoning.
OpenAI also shared results from internal testing focused on factual accuracy across its latest models. The tests targeted financial, medical, and legal questions that require detailed factual responses. The company reported roughly 62% fewer answers containing at least one factual error with GPT-5.6 Luna compared to GPT-5.5 Instant. Similarly, GPT-5.6 Sol showed a decrease of about 68% under the same testing conditions. Improvements were also noted in handling dates, numbers, sources, rules, and assumptions when these details impacted the accuracy of the responses.
New models incorporate enhanced protections for younger users
The GPT-5.6 models feature additional safeguards aimed at users estimated to be under 18. These protections restrict content involving romantic roleplay, age-restricted challenges, and claims that might promote replacing real-world relationships. Further boundaries are in place for sexual material, eating disorders, dangerous activities, restricted goods, and graphic violence. OpenAI mentioned that it conducted extra assessments for responses involving minors, and the same safeguards will continue to apply when unlimited text conversations become available to Free and Go accounts under the expanded ChatGPT access.
This rollout covers the main ChatGPT service and does not alter every product utilizing GPT-5.6. Versions of GPT-5.6 Sol used in ChatGPT Work and Codex remain unaffected by this update. Both Plus and Pro users can now access the updated Sol model and reasoning controls, while Free and Go users will have Luna as their default model this week. The unlimited text conversations and Think button will be introduced next week, although separate limits for images, uploads, and other resource-heavy tools will stay in effect.
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