SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is broadening the availability of ChatGPT for Free and Go users by offering unlimited text conversations powered by GPT-5.6 Luna. The company announced that this update will begin next week and will be implemented with safeguards to prevent misuse. During the current rollout, GPT-5.6 Luna is becoming the default model for these users. Additionally, free users will gain access to a Think button, which provides the model with extra time to process complex inquiries before responding.
This unlimited access is specifically for text-based interactions within ChatGPT. Separate limitations will still apply to file uploads, image creation, and other tools that require additional processing power. The Think feature will be introduced next week alongside the expanded text allowance, enabling Luna to spend more time reasoning prior to generating an answer. Consequently, ChatGPT users on Free and Go plans will enjoy broader core chat capabilities, though not all features will have unlimited use.
GPT-5.6 consists of Luna, Sol, and Terra, each tailored for different performance levels and computational requirements. Luna is designed as the faster, more economical option in this series. OpenAI stated ChatGPT now reaches roughly one billion users weekly across search, research, planning, writing, and other tasks. The latest rollout puts Luna at the core of the standard experience for Free and Go accounts, while maintaining separate usage rules for tools outside regular text conversations.
Enhanced GPT-5.6 Sol controls now available for paid subscribers
Subscribers of ChatGPT Plus and Pro are now receiving an updated GPT-5.6 Sol version for their daily interactions. Sol supports both quick replies and more in-depth reasoning within paid plans. The company mentioned that this revised model offers more targeted responses and avoids unnecessary detail when a shorter reply suffices. Additionally, Plus and Pro users now have access to a reasoning slider across web, mobile, and desktop platforms, allowing them to adjust how much processing ChatGPT applies to tasks like research, planning, writing, and coding.
Internal testing indicated that the newest models have lower rates of factual inaccuracies, according to company evaluations. Tests focused on financial, medical, and legal prompts that require precise factual answers. Results showed about 62% fewer responses with at least one factual error for GPT-5.6 Luna compared to GPT-5.5 Instant. For GPT-5.6 Sol, the reduction was approximately 68% under the same testing criteria. The company also highlighted improvements in handling dates, numbers, sources, rules, and assumptions when such details influence an answer.
Safety measures continue across expanded ChatGPT functionalities
The latest models incorporate enhanced 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. Additional restrictions target sexual content, eating disorders, dangerous activities, restricted goods, and graphic violence. The company noted the introduction of new evaluations for responses involving younger users. Unlimited text conversations for Free and Go accounts will continue to operate within the existing safeguards against abuse.
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 are not affected by 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 starting this week. Unlimited text chats and the Think button will be available next week, with separate limits remaining in place for uploads, images, and other tools.