SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is broadening access to ChatGPT for Free and Go users by enabling unlimited text conversations powered by GPT-5.6 Luna. The company announced that this update will roll out starting next week and will include safeguards to prevent misuse. During this phase, GPT-5.6 Luna will serve as the default model for these users. Additionally, free users will gain a new Think button that allows the model more time to analyze complex questions before generating a response.
This unlimited text access is specific to conversations within ChatGPT. Other features such as file uploads, image generation, and additional tools will continue to have separate limits due to their processing requirements. The Think button will be introduced alongside the expanded text allowance next week, providing Luna with extra time to perform reasoning before replying. Consequently, Free and Go plan users will enjoy more extensive access to the core chat functionality, though not to all features without limits.
GPT-5.6 encompasses Luna, Sol, and Terra, each tailored for different levels of performance and computational needs. Luna is designed to be the faster and more economical option within this family. OpenAI stated that ChatGPT now reaches approximately one billion users weekly across various activities such as search, research, planning, and writing. This latest rollout positions Luna at the center of the standard experience for Free and Go accounts, while maintaining separate usage rules for tools outside typical text conversations.
Enhanced GPT-5.6 Sol controls now available for paid users
Subscribers to ChatGPT Plus and Pro are now receiving an upgraded version of GPT-5.6 Sol for their regular interactions. Sol is capable of delivering both swift answers and more thorough reasoning within paid plans. The company mentioned that this updated model provides more targeted responses and avoids unnecessary details when a concise reply suffices. Paid plans also include a reasoning slider accessible across web, mobile, and desktop platforms. This feature allows users to adjust how much processing ChatGPT applies to tasks like research, planning, writing, and coding.
Internal testing results show a decrease in factual inaccuracies with the newest models. Tests focused on prompts related to finance, healthcare, and legal matters requiring precise factual responses. The findings indicated about 62% fewer responses containing at least one factual error when comparing GPT-5.6 Luna to GPT-5.5 Instant. GPT-5.6 Sol demonstrated a reduction of roughly 68% under the same evaluation criteria. The company also highlighted improvements in handling dates, numbers, sources, rules, and assumptions when these details impacted the responses.
Safety protocols maintained across expanded ChatGPT access
The new models also incorporate enhanced protections for users identified as under 18. The safeguards cover areas such as romantic roleplay, age-restricted challenges, and claims that might substitute real-world relationships. Additional restrictions address sexual content, eating disorders, dangerous activities, restricted goods, and graphic violence. The company stated that new evaluations have been implemented to review responses involving younger users. Unlimited text conversations for Free and Go accounts will still operate within the platform’s existing abuse prevention measures.
This update primarily targets the main ChatGPT experience and does not alter other products utilizing GPT-5.6. The GPT-5.6 Sol versions used in ChatGPT Work and Codex remain unchanged under this release. Currently, paid subscribers can access the updated Sol model and reasoning controls. Free and Go users will see Luna as their default model starting this week. Unlimited chats and the Think button will be available next week, while uploads, images, and other tools will continue to have separate usage restrictions.