SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is expanding access to ChatGPT by offering Free and Go users unlimited text conversations with GPT-5.6 Luna. The company indicated that the new policy will take effect next week and will be subject to safeguards designed to prevent misuse. During this rollout, GPT-5.6 Luna is also becoming the default model for affected accounts. Additionally, free users will see a Think button that enables the system to dedicate more time to complex questions before providing an answer.
This new access applies solely to text chats and does not remove all usage restrictions across ChatGPT. OpenAI clarified that limits will still apply to file uploads, image generation, and other tools requiring extra processing power. The introduction of the Think feature coincides with the launch of unlimited text messaging next week. It allows GPT-5.6 Luna to have additional reasoning time for tasks requiring deeper analysis. The company continues to enforce separate controls on features beyond standard conversations, including tools available under different usage limits.
OpenAI has introduced GPT-5.6 as a family of models, comprising Luna, Sol, and Terra. Luna is designed to be the faster and more cost-effective option within the lineup. The company stated that ChatGPT now attracts approximately one billion weekly users across searches, research, planning, writing, and other activities. With the upcoming change, Luna will serve as the primary ChatGPT model for users on Free and Go plans. The rollout aims to broaden access to the core chat service while maintaining tool-specific limitations.
Paid subscribers get an upgraded reasoning engine
Subscribers of ChatGPT Plus and Pro will also gain access to an updated version of GPT-5.6 Sol for daily use. Sol supports both quick responses and more intricate reasoning within the paid tier. OpenAI reported that this update delivers more targeted answers and minimizes unnecessary details when a simpler reply suffices. Paid users will also have a reasoning slider accessible across web, mobile, and desktop platforms. This control allows users to determine how much processing ChatGPT applies to research, planning, coding, writing, and other tasks.
Furthermore, OpenAI shared that internal evaluations of its latest models demonstrated reduced rates of factual inaccuracies. Tests focusing on financial, medical, and legal prompts requiring detailed factual responses indicated that answers containing at least one factual error decreased by roughly 62% with GPT-5.6 Luna in comparison to GPT-5.5 Instant. For GPT-5.6 Sol, errors fell by about 68%. The company also noted improvements in Sol’s ability to handle dates, numbers, sources, rules, and assumptions when accuracy was critical.
Unlimited text access maintains safety restrictions for users under 18
OpenAI stated that its latest ChatGPT models incorporate additional safeguards aimed at protecting younger users. These measures seek to prevent romantic roleplay, age-restricted challenges, and claims that could substitute real-world relationships. They also include limits on sexual content, eating disorders, dangerous activities, restricted items, and graphic violence. The company mentioned that it has implemented new assessments for responses involving minors. Unlimited chat conversations will continue to be governed by existing abuse safeguards when expanded access is granted to Free and Go accounts.
This update pertains primarily to the main ChatGPT experience and does not affect all OpenAI products utilizing GPT-5.6 models. The company clarified that GPT-5.6 Sol versions used in ChatGPT Work and Codex remain unchanged with this release. Paid users can access the updated Sol model and reasoning controls immediately. Meanwhile, 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, with separate limits still applying to images, uploads, and other tools.