SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is broadening access to ChatGPT for Free and Go plan members by offering unlimited text interactions powered by GPT-5.6 Luna. The company announced that this update will be rolled out next week and will be subject to safeguards designed 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 Think button, enabling the model to spend more time analyzing complex questions before providing an answer.
This unlimited access specifically pertains to text-based conversations within ChatGPT. Limits for file uploads, image generation, and other tools that require extra processing will remain in place. The Think feature will be introduced alongside the expanded text allowance next week, allowing Luna to engage in more detailed reasoning before delivering responses. Consequently, ChatGPT users on Free and Go plans will have enhanced access to core chat functions but will still face restrictions on some features outside basic conversations.
GPT-5.6 encompasses Luna, Sol, and Terra, each tailored to different performance levels and computational needs. Luna is positioned as the faster, more cost-effective option within this suite. According to OpenAI, ChatGPT now reaches approximately one billion users weekly across various tasks such as searching, research, planning, and writing. The latest rollout centers Luna as the default experience for Free and Go accounts, while maintaining separate usage policies for tools outside typical text interactions.
Enhanced GPT-5.6 Sol controls now available for paid subscribers
Subscribers to ChatGPT Plus and Pro are now receiving an upgraded version of GPT-5.6 Sol to support their daily interactions. This model facilitates both quick replies and more in-depth reasoning for paid plans. The company stated that the improved model produces more focused responses and avoids unnecessary details when concise answers suffice. Paid users also gain access to a reasoning slider accessible via web, mobile, and desktop platforms. This control allows users to determine how much computational effort ChatGPT dedicates to tasks like research, planning, writing, and coding.
Internal testing indicates a reduction in factual inaccuracies with the newest models, according to company data. Tests involving financial, medical, and legal prompts requiring detailed factual responses showed approximately 62% fewer responses containing at least one factual error for GPT-5.6 Luna compared to GPT-5.5 Instant. Similarly, GPT-5.6 Sol demonstrated a decrease of about 68% under the same testing conditions. The company also highlighted improvements in handling dates, figures, sources, rules, and assumptions when these details influenced the accuracy of answers.
Safety protocols maintained across broader ChatGPT availability
The latest models incorporate additional safeguards specifically designed to protect users identified as under 18. The safeguards address issues such as romantic roleplay, age-restricted challenges, and claims that could substitute real-world relationships. Further restrictions cover sexual content, eating disorders, dangerous activities, restricted products, and graphic violence. The company also announced the implementation of new assessments for responses involving younger users. The unlimited text conversation feature for Free and Go accounts will continue to operate within the platform’s existing abuse prevention measures.
This update primarily affects 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 unaffected by this release. Paid subscribers can now access the updated Sol model and reasoning controls. Meanwhile, Free and Go users will see Luna as their default model starting this week. The unlimited text chats and Think button will be introduced next week, with other tools like uploads and image generation continuing to have separate usage limits.