SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is broadening access for Free and Go users by offering unlimited text interactions powered by GPT-5.6 Luna. The company announced that this update will begin next week and will be subject to safeguards against misuse. During this rollout, GPT-5.6 Luna will serve as the default model for those users. Additionally, free users will gain a Think button that allocates more time for the model to analyze complex questions before responding.
This unlimited access pertains specifically to text conversations within ChatGPT, while separate limitations will persist for file uploads, image creation, and other tools that require extra processing. The introduction of the Think feature alongside the expanded text allowance is scheduled for next week, enabling Luna to dedicate more time to reasoning prior to delivering an answer. Consequently, ChatGPT users on Free and Go plans will enjoy broader access to the core chat service, though not all features will be unlimited.
GPT-5.6 incorporates Luna, Sol, and Terra, each designed for varying levels of performance and computational demands. Luna is positioned as the faster, more cost-efficient option within this family. According to OpenAI, ChatGPT now reaches approximately one billion users weekly across functions like search, research, planning, writing, and more. This latest rollout places Luna at the core of the standard experience for Free and Go accounts, while separate rules remain for tools outside typical text conversations.
Enhanced GPT-5.6 Sol Controls for Paid Subscribers
Subscribers to ChatGPT Plus and Pro will now have access to an upgraded version of GPT-5.6 Sol for their daily interactions. Sol is designed to support both quick replies and more in-depth reasoning within paid plans. The company stated that this revised model provides more targeted responses and avoids unnecessary details when a brief answer suffices. Additionally, Plus and Pro users will see a new reasoning slider available across web, mobile, and desktop platforms, allowing them to adjust the amount of processing ChatGPT applies to tasks such as research, planning, writing, and coding.
Internal testing has indicated a reduction in factual inaccuracies for the latest models. The tests, which involved financial, medical, and legal prompts requiring detailed responses, showed about 62% fewer responses with at least one factual error for GPT-5.6 Luna compared to GPT-5.5 Instant. Similarly, GPT-5.6 Sol demonstrated a decrease of around 68% in such errors under the same evaluation. The company also noted improvements in handling dates, numbers, sources, rules, and assumptions when these details influence an answer.
Safety Protocols Maintain Their Role in Expanded Access
The newest models also feature enhanced protections for users identified as under 18. The safeguards encompass areas like romantic roleplay, age-restricted challenges, and claims that could substitute real-world relationships. Additional limits address sexual content, eating disorders, dangerous activities, restricted goods, and graphic violence. The company mentioned that new assessments for responses involving minors have been introduced. Unlimited text conversations for Free and Go accounts will continue to operate under the existing safeguards against abuse.
This update primarily enhances the main ChatGPT experience and does not alter all products utilizing GPT-5.6. The GPT-5.6 Sol versions used in ChatGPT Work and Codex remain unchanged under this release. Paid subscribers can now access the updated Sol model and reasoning controls, while Free and Go users will see Luna as their default model this week. Unlimited text chats and the Think button are scheduled to be available next week, with uploads, images, and other tools still subject to separate usage limits.