SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is broadening access to ChatGPT for Free and Go plan users by providing unlimited text interactions powered by GPT-5.6 Luna. The company announced that this change will take effect 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 a Think button that allocates extra time for the model to analyze complex questions before generating a reply.
This unlimited access is specifically limited to text-based conversations within ChatGPT. Separate restrictions remain in place for file uploads, image generation, and other tools that demand additional processing power. The Think feature will be introduced alongside the expanded text quota next week, allowing Luna to dedicate more time to reasoning before responding. Consequently, ChatGPT users on Free and Go plans will enjoy broader access to the core chat functionality, but without unlimited use of all features.
GPT-5.6 comprises Luna, Sol, and Terra, each tailored to different performance levels and computing needs. Luna is positioned as the faster and more cost-effective option within this family. ChatGPT now reaches approximately one billion users weekly across various tasks such as search, research, planning, and writing. The latest rollout places Luna at the heart of the standard experience for Free and Go accounts, while maintaining separate usage policies for tools outside basic text conversations.
Enhanced GPT-5.6 Sol features available for paid subscribers
Subscribers to ChatGPT Plus and Pro now have access to an updated version of GPT-5.6 Sol for their daily interactions. Sol is designed to provide both rapid responses and more in-depth reasoning within paid plans. The company indicated that this revised model offers more targeted replies and minimizes unnecessary details when brief responses suffice. Additionally, Plus and Pro members are now able to use a reasoning slider across web, mobile, and desktop platforms, giving them control over the amount of processing applied to tasks like research, planning, writing, and coding.
Internal testing shows a reduction in factual inaccuracies with the newest models, according to the company. Tests involving financial, medical, and legal prompts—requiring detailed factual responses—revealed approximately 62% fewer responses containing factual errors with GPT-5.6 Luna compared to GPT-5.5 Instant. GPT-5.6 Sol demonstrated an even greater decrease of about 68%. The company also noted improvements in handling dates, numbers, sources, rules, and assumptions when these details are critical to the response.
Safety protocols maintained amid expanded ChatGPT availability
The newest models incorporate enhanced protections for users identified as being under 18. The safeguards address topics such as romantic roleplay, age-restricted challenges, and claims that could simulate real-world relationships. Additional restrictions are in place for sexual content, eating disorders, dangerous activities, restricted items, and graphic violence. The company stated that new evaluation measures have been introduced to monitor responses involving younger users. The existing safeguards for abuse prevention will continue to govern unlimited text conversations on Free and Go accounts.
This update primarily pertains to the core 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 along with reasoning controls. Free and Go users will see Luna set as their default model starting this week. The unlimited text chats and Think button will be rolled out next week, while uploads, images, and other tools will still operate under separate usage limits.
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