SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is expanding access to ChatGPT for Free and Go users by removing restrictions on text conversations under the GPT-5.6 Luna model. The company announced that unlimited text chats will be available starting next week, with safeguards against misuse still in place. During this rollout, Luna will serve as the default model for those plans. Additionally, Free users will soon see a Think button, allowing the model to spend extra time reasoning through more complex queries before providing a response.
This new limit removal applies specifically to standard text interactions, while image generation, file uploads, and other resource-heavy features will still have limits. OpenAI explained that the Think button will be introduced alongside the unlimited text feature next week. Users can activate it when they require additional reasoning time for a particular question. This change broadens the core conversational capabilities of ChatGPT for Free and Go accounts, though other tools and services will continue to have separate restrictions.
GPT-5.6 encompasses various models, including Luna, Sol, and Terra, each tailored to different performance needs. Luna is the faster, more economical option within this lineup. OpenAI stated that approximately one billion people utilize ChatGPT weekly for tasks such as research, planning, writing, and searching. The recent update designates Luna as the primary model for Free and Go users. Other GPT-5.6 models remain accessible in different products and plans suited to various workloads and access levels.
Expansion of free access while tool limitations persist
Subscribers to ChatGPT Plus and Pro are now using an updated GPT-5.6 Sol model for both routine interactions and more complex reasoning tasks. The company highlighted that Sol now delivers more targeted responses and minimizes unnecessary details when shorter replies are sufficient. Paid plans also include a reasoning slider on web, mobile, and desktop platforms. This feature allows users to adjust how much processing power the model uses for a given request, supporting activities like research, coding, writing, and planning that demand varying levels of reasoning.
OpenAI has also released results from internal testing focused on the factual accuracy of its newest models. These assessments examined responses to financial, medical, and legal questions requiring detailed factual information. The company reported a roughly 62% decrease in answers containing at least one factual error with GPT-5.6 Luna compared to GPT-5.5 Instant. Additionally, GPT-5.6 Sol demonstrated a reduction of approximately 68% under the same testing conditions. OpenAI also noted improvements in handling dates, numbers, sources, rules, and assumptions when these details impact the final output.
Enhanced protections for younger users included in new models
Safeguards have been added to the GPT-5.6 models to better protect users believed to be under 18. These protections address content such as romantic roleplay, age-restricted challenges, and claims that might influence users to replace real-world relationships. Additional restrictions apply to sexual content, eating disorders, dangerous activities, restricted items, and graphic violence. OpenAI also conducted further assessments on responses involving younger users. These abuse safeguards will remain active when unlimited text conversations are rolled out to Free and Go accounts under the expanded ChatGPT access.
This expansion applies to the main ChatGPT platform and does not alter every product utilizing GPT-5.6. Versions of GPT-5.6 Sol used within ChatGPT Work and Codex are unchanged as part of this update. Users with Plus and Pro plans can now access the updated Sol model and reasoning controls. Meanwhile, Free and Go users will receive Luna as their default model this week. The unlimited text conversations and Think button will be introduced next week, with other limits on images, uploads, and intensive tools remaining in place.
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