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 next week and will be subject to safeguards against 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, providing 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 continue to apply for file uploads, image creation, and other features that need additional processing. The introduction of the Think button will coincide with the expanded text allowance next week, allowing Luna to dedicate more time to reasoning prior to generating answers. As a result, Free and Go plan users will have increased access to the core chat functionality, though not all features will be unlimited.
GPT-5.6 encompasses Luna, Sol, and Terra, each tailored for different levels of performance and computational requirements. Luna, in particular, is designed to be the faster and more economical option within this suite. According to OpenAI, ChatGPT now reaches approximately one billion users weekly across tasks like search, research, planning, and writing. This latest update positions Luna as the default experience for Free and Go accounts, while maintaining separate usage rules for tools outside the regular text conversations.
Enhanced GPT-5.6 Sol controls now available for paid members
Subscribers to ChatGPT Plus and Pro are now receiving an upgraded GPT-5.6 Sol model for their routine interactions. Sol supports rapid responses as well as more in-depth reasoning within paid plans. The company stated that the new model provides more targeted replies and avoids unnecessary details when brevity suffices. Additionally, Plus and Pro users now have access to a reasoning slider across web, mobile, and desktop platforms, which allows them to regulate how much processing ChatGPT dedicates to research, planning, writing, coding, and similar tasks.
Internal testing indicates that these latest models deliver a lower rate of factual errors, according to company reports. The evaluations involved financial, medical, and legal prompts that required accurate, detailed answers. Results showed approximately 62% fewer responses with at least one factual inaccuracy for GPT-5.6 Luna compared to GPT-5.5 Instant. Similarly, GPT-5.6 Sol demonstrated a reduction of about 68% under the same testing conditions. The company also highlighted improvements in handling dates, numbers, sources, rules, and assumptions when these details were relevant to an answer.
Safeguards remain in place across expanded ChatGPT access
The newest models incorporate additional protections for users identified as under 18. The safeguards address issues such as romantic roleplay, age-restricted challenges, and claims that could substitute for real-world relationships. They also set boundaries regarding sexual content, eating disorders, dangerous activities, restricted substances, and graphic violence. The company confirmed that new evaluation methods have been introduced for responses involving younger users. Unlimited text conversations for Free and Go accounts will continue to operate within the platform’s existing abuse prevention measures.
This update primarily affects the main ChatGPT interface and does not alter every product utilizing GPT-5.6. The GPT-5.6 Sol versions used in ChatGPT Work and Codex remain unchanged by this release. Paid subscribers can now access the updated Sol model and the 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 available next week, while upload, image, and other tool limits will stay separate.