SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is expanding access to ChatGPT for Free and Go plans by offering unlimited text conversations powered by GPT-5.6 Luna. The company announced that this change will take effect next week and will include safeguards to prevent misuse. During the current rollout, GPT-5.6 Luna will serve as the default model for these users. Additionally, free users will gain a Think button, allowing the model more time to process complex questions before providing a response.
This unlimited access is specifically limited to text exchanges within ChatGPT. Separate restrictions will remain in place for file uploads, image creation, and other tools requiring extra processing. The Think feature will be introduced next week alongside the expanded text allowance, enabling Luna to spend additional time reasoning before generating an answer. As a result, ChatGPT users on Free and Go plans will enjoy broader access to the core chat service, though they will not have unlimited use of all features.
GPT-5.6 includes Luna, Sol, and Terra, with each model tailored to different performance levels and computational needs. Luna is positioned as the faster, more economical option within this family. According to OpenAI, ChatGPT now reaches approximately one billion users each week across activities like search, research, planning, writing, and more. The latest update emphasizes Luna as the default experience for Free and Go accounts while maintaining distinct usage policies for tools outside of standard text conversations.
Enhanced GPT-5.6 Sol controls now available for paid subscribers
ChatGPT Plus and Pro users are now receiving an improved version of GPT-5.6 Sol for their daily interactions. Sol supports both quick responses and more in-depth reasoning within paid plans. OpenAI states that the updated model provides more targeted replies and avoids unnecessary details when shorter answers suffice. Additionally, Plus and Pro members now have access to a reasoning slider across web, mobile, and desktop platforms, which allows them to control how much processing ChatGPT applies to research, planning, writing, coding, and similar tasks.
Internal testing indicates a significant decrease in factual inaccuracies with the newest models. The evaluations, which involved financial, medical, and legal prompts requiring precise answers, showed about 62% fewer responses containing at least one factual error for GPT-5.6 Luna compared to GPT-5.5 Instant. GPT-5.6 Sol demonstrated a reduction of approximately 68% under the same testing conditions. The company also highlighted improved handling of dates, numbers, sources, rules, and assumptions when these details impacted responses.
Safety protocols remain in place across expanded ChatGPT offerings
The latest models incorporate additional protections for users identified as under 18. The safeguards address topics such as romantic roleplay, age-restricted challenges, and claims that could substitute real-world relationships. They also cover sensitive areas like sexual content, eating disorders, risky activities, restricted goods, and graphic violence. The company confirmed that new assessments for responses involving younger users have been introduced. Unlimited text conversations for Free and Go accounts will continue to operate under the platform’s existing abuse prevention measures.
This update primarily affects the main ChatGPT experience and does not alter every product utilizing GPT-5.6. The GPT-5.6 Sol versions used in ChatGPT Work and Codex remain unchanged in this release. Paid subscribers can now access the updated Sol model and reasoning controls. Meanwhile, Free and Go users will see Luna set as their default model this week. Unlimited chats and the Think button will be available next week, whereas uploads, images, and other tools will continue to be subject to separate usage limits.