SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is expanding access to ChatGPT for Free and Go plans by removing the text chat restrictions under GPT-5.6 Luna. The company announced that unlimited text conversations will be available starting next week, with safeguards against misuse still in place. During this phase, Luna will become the default model for these plans. Additionally, free users will soon see a Think button, enabling the model to dedicate extra time to handle more complex questions before delivering a response.
This increased allowance applies solely to standard text chats and does not extend to features like image generation, file uploads, or other tools that require extra computational resources. OpenAI stated that the Think button will be introduced alongside unlimited text access next week, allowing users to activate it when a question requires additional reasoning. This update broadens the core conversational capabilities for Free and Go accounts while maintaining separate limits for other tools and features.
GPT-5.6 includes multiple models such as Luna, Sol, and Terra, each designed for different performance needs. Luna functions as the faster, more cost-efficient option within the family. OpenAI noted that approximately one billion people use ChatGPT weekly for tasks involving research, planning, writing, and searching. With this latest update, Luna becomes the primary model for Free and Go users, while other GPT-5.6 variants remain available for specialized workloads and access levels.
Broadened Free Access Maintains Tool Limits
Subscribers of ChatGPT Plus and Pro are now receiving an upgraded GPT-5.6 Sol model, tailored for routine tasks and more intricate reasoning. The company explained that Sol now provides more focused responses and minimizes unnecessary detail when shorter answers suffice. Paid plans also gain a reasoning slider across web, mobile, and desktop platforms, allowing users to control how much processing power the model applies. This feature supports activities like research, coding, writing, and planning, which require varying reasoning levels.
OpenAI shared results from internal testing focusing on factual accuracy within its newest models. The evaluations included financial, medical, and legal questions demanding detailed factual responses. The company reported a reduction of about 62% in answers with at least one factual error when using GPT-5.6 Luna compared to GPT-5.5 Instant. For GPT-5.6 Sol, the decrease was approximately 68% under similar testing conditions. OpenAI also highlighted improvements in handling dates, numbers, sources, rules, and assumptions when these details impacted the responses.
Enhanced Protections for Younger Users in New Models
Safeguards have been added to the GPT-5.6 models for users under 18, according to OpenAI. These protections include restrictions on romantic roleplay, age-restricted challenges, and claims that could promote replacing real-world relationships. Additional limits prevent responses involving sexual content, eating disorders, dangerous activities, restricted substances, and graphic violence. The company mentioned that further evaluations have been introduced for responses involving younger users, and these safeguards will remain in effect once unlimited text conversations are accessible to Free and Go accounts under the expanded ChatGPT access.
This rollout covers the primary ChatGPT service but does not alter other products utilizing GPT-5.6. Versions of GPT-5.6 Sol used in ChatGPT Work and Codex will stay unchanged as part of this update. Users with Plus and Pro plans can now access the revised Sol model and reasoning controls, while Free and Go users will see Luna as the default model this week. The availability of unlimited text conversations and the Think button will follow next week, with separate limits still in place for images, uploads, and other intensive tools.