SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is expanding access to ChatGPT for Free and Go users by eliminating the restrictions on text conversations under GPT-5.6 Luna. The company stated that unlimited text exchanges will commence next week, with safeguards against misuse still in place. During this phase, Luna will serve as the default model for these plans. Additionally, Free users will get a new Think button at the same time, enabling the model to allocate extra reasoning time for more complex questions before generating a response.
This increased allowance applies specifically to standard text chats, not all functions within ChatGPT. Limits will still be enforced for image generation, file uploads, and other tools that require additional computational power. OpenAI mentioned that the Think button will launch alongside unlimited text access next week. Users can activate this feature when a query needs more thorough reasoning. This update broadens the core conversational capabilities for Free and Go accounts while maintaining separate restrictions on other tools and services.
GPT-5.6 comprises several models, including Luna, Sol, and Terra, each tailored for different performance needs. Luna is designed as the faster, more cost-effective option in the lineup. OpenAI reported that approximately one billion people utilize ChatGPT weekly for activities like research, planning, writing, and searching. With this update, Luna becomes the primary ChatGPT model available to Free and Go users. The other GPT-5.6 models remain accessible within various products and plans suited for diverse workloads and access levels.
Free access is widened while tool limits stay in place
Subscribers of ChatGPT Plus and Pro are now receiving an updated GPT-5.6 Sol model for regular use and more advanced reasoning tasks. The company highlighted that Sol provides more targeted responses and minimizes unnecessary details when shorter replies are sufficient. Paid plans also include a reasoning slider accessible on web, mobile, and desktop platforms, allowing users to adjust the amount of processing applied to each request. This feature supports research, coding, writing, planning, and other activities requiring varying levels of reasoning.
OpenAI also shared results from internal testing focusing on the factual accuracy of its newest models. The assessments involved financial, medical, and legal questions demanding detailed factual information. The company indicated that GPT-5.6 Luna demonstrated approximately a 62% reduction in answers with at least one factual error compared to GPT-5.5 Instant. GPT-5.6 Sol showed an improvement of about 68% on the same test. OpenAI also noted enhancements in handling dates, numbers, sources, rules, and assumptions, especially when these elements influenced the accuracy of the responses.
Enhanced protections now safeguard younger users in updated models
The GPT-5.6 models incorporate new safeguards aimed at users under 18. These measures restrict content related to romantic roleplay, age-restricted challenges, and claims that could promote replacing real-world relationships. Additional boundaries are set around sexual material, eating disorders, dangerous activities, restricted goods, and graphic violence. OpenAI stated that it conducted further evaluations for responses involving younger users. The same abuse prevention safeguards will continue to be active when unlimited text conversations are available for Free and Go accounts under the expanded ChatGPT access.
This rollout impacts the primary ChatGPT service but does not alter other products that utilize GPT-5.6. Versions of GPT-5.6 Sol used in ChatGPT Work and Codex are unaffected by this update. Both Plus and Pro users can now access the revised Sol model along with the reasoning controls. Meanwhile, Free and Go users will see Luna as their default model this week, with unlimited text conversations and the Think button launching next week. Separate limits will still apply to image generation, uploads, and other resource-heavy tools.