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 conversations will commence next week, with safeguards against misuse still in place. During the current rollout, Luna will become the default model for these plans. Simultaneously, Free users will gain access to a Think button, enabling the model to allocate more time for reasoning through complex questions before providing a response.
This increased allowance applies specifically to standard text interactions and does not extend to all ChatGPT functionalities. Limits will continue to be enforced for image generation, file uploads, and other tools that demand additional computational resources. OpenAI stated that the Think button will be introduced alongside unlimited text access next week. Users can activate it when a query requires extra reasoning. This update broadens the core conversational capabilities for Free and Go accounts while maintaining separate restrictions on other features and services.
GPT-5.6 comprises multiple models, including Luna, Sol, and Terra, each tailored for different performance needs. Luna serves as the faster, more cost-effective option within this lineup. OpenAI noted that approximately one billion people now use ChatGPT weekly for tasks such as research, planning, writing, and searching. The latest update designates Luna as the main ChatGPT model for Free and Go users. Other GPT-5.6 variants remain accessible within various products and plans designed for diverse workloads and access levels.
Expanded Free access while tool restrictions stay in place
Subscribers to ChatGPT Plus and Pro now have access to an upgraded GPT-5.6 Sol model, optimized for regular use and advanced reasoning. The company explained that Sol now provides more targeted answers and minimizes unnecessary details when shorter responses suffice. Paid users also benefit from a reasoning slider on web, mobile, and desktop platforms. This feature allows adjusting the amount of processing applied to each request, supporting tasks like research, coding, writing, and planning with different complexity levels.
OpenAI shared results from internal tests assessing the factual accuracy of its latest models. These evaluations focused on financial, medical, and legal questions requiring precise factual responses. The company reported about 62% fewer answers containing at least one factual error with GPT-5.6 Luna compared to GPT-5.5 Instant. For GPT-5.6 Sol, the reduction was approximately 68% using the same testing methodology. Additionally, OpenAI noted improvements in handling dates, numbers, sources, rules, and assumptions when these details impacted the correctness of responses.
New models incorporate protections for underage users
Safeguards have been added to the GPT-5.6 models to better protect users believed to be under 18. These measures include restrictions on romantic roleplay, age-restricted challenges, and claims that might encourage users to substitute real-world relationships. Additional boundaries limit content related to sexual material, eating disorders, risky activities, restricted products, and graphic violence. OpenAI explained that further evaluations were implemented for responses involving younger users. The same abuse safeguards will remain active when unlimited text conversations are available to Free and Go accounts under the expanded ChatGPT access.
This rollout affects the primary ChatGPT service but does not alter every product utilizing GPT-5.6. Variants like GPT-5.6 Sol in ChatGPT Work and Codex remain unchanged in this update. Users of Plus and Pro can now access the revised Sol model along with its reasoning controls. Meanwhile, Free and Go users will see Luna as their default model this week. The introduction of unlimited conversations and the Think button will happen next week, with separate limits still in place for images, uploads, and other processing-heavy tools.
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