SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is enhancing ChatGPT availability for Free and Go users by enabling unlimited text conversations powered by GPT-5.6 Luna. The company announced that this change will take effect next week and will be governed by safeguards to prevent misuse. During this rollout, GPT-5.6 Luna is set as the default model for these users. Additionally, free-tier users will gain a Think button that allows more time for the model to analyze complex questions before responding.
This unlimited access specifically pertains to text-based interactions within ChatGPT. Separate restrictions will remain in place for file uploads, image generation, and other functionalities requiring additional processing. The introduction of the Think feature will coincide with the expanded text allowance next week, providing Luna with more time to perform reasoning before delivering an answer. As a result, ChatGPT users on Free and Go plans will experience broader access to core chat features, though not all features will be available with unlimited use.
GPT-5.6 comprises Luna, Sol, and Terra, each tailored for different performance levels and computing demands. Luna, in particular, offers a faster and more economical option within this family. According to OpenAI, ChatGPT now reaches approximately one billion users weekly across tasks such as search, research, planning, and writing. The recent rollout positions Luna at the core of the standard experience for Free and Go accounts while maintaining distinct usage rules for tools outside regular text conversations.
Enhanced GPT-5.6 Sol features for paying subscribers
Subscribers to ChatGPT Plus and Pro are now receiving an upgraded GPT-5.6 Sol model for their daily interactions. Sol supports both swift replies and more detailed reasoning within paid plans. The company stated that the improved model provides more targeted responses and avoids unnecessary details when a shorter answer suffices. Paid users also get a reasoning slider accessible across web, mobile, and desktop platforms, enabling them to adjust how much processing ChatGPT applies to tasks like research, planning, writing, and coding.
Internal testing indicates a reduction in factual errors for the latest models. The evaluations, which involved financial, medical, and legal prompts requiring precise answers, showed about 62% fewer responses with at least one factual mistake for GPT-5.6 Luna compared to GPT-5.5 Instant. For GPT-5.6 Sol, the decrease was approximately 68% under the same testing conditions. The company also highlighted improvements in handling dates, numbers, sources, rules, and assumptions when these details are relevant to the responses.
Safeguards Persist Despite Broadened ChatGPT Access
Additional protections have been integrated into the latest models to safeguard users identified as under 18. The safeguards address topics such as romantic roleplay, age-restricted challenges, and claims that could substitute real-world relationships. They also impose boundaries related to sexual content, eating disorders, dangerous activities, restricted goods, and graphic violence. The company mentioned that new evaluations for responses involving younger users have been introduced. Unlimited text conversations for Free and Go accounts will continue to be protected by existing abuse prevention measures.
This update concentrates on the primary ChatGPT experience and does not alter every product utilizing GPT-5.6. The GPT-5.6 Sol versions used in ChatGPT Work and Codex will remain unchanged under this update. Currently, paid subscribers can access the updated Sol model and reasoning controls. Free and Go users will see Luna as the default model starting this week, with unlimited text chats and the Think button following next week. Uploads, images, and other tools will still operate under separate usage limitations.