SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is broadening access to ChatGPT for Free and Go users by offering unlimited text exchanges powered by GPT-5.6 Luna. The company announced that this update will commence next week and will be implemented with safeguards to prevent misuse. During this rollout, GPT-5.6 Luna will become the default model for these users. Additionally, free users will gain a Think button feature, allowing the model extra time to analyze complex questions before generating responses.
This unlimited access specifically applies to text-based interactions within ChatGPT. Separate restrictions remain in place for file uploads, image creation, and other functionalities requiring additional processing power. The Think feature will be introduced alongside the expanded text limit next week, enabling Luna to spend more time reasoning before replying. Consequently, ChatGPT users on Free and Go plans will have increased access to the core chat service, 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 computational demands. Luna is positioned as the faster, more economical choice within the family. OpenAI stated that ChatGPT now engages approximately one billion users weekly across various tasks such as search, research, planning, and writing. The latest update places Luna at the core of the standard experience for Free and Go accounts, while maintaining distinct usage policies for other tools outside typical text conversations.
Enhanced GPT-5.6 Sol Features Offer More Control for Paid Subscribers
Subscribers to ChatGPT Plus and Pro are now receiving an upgraded version of GPT-5.6 Sol for their daily interactions. Sol supports rapid responses and in-depth reasoning within paid plans. The company noted that the revised model provides more targeted replies and minimizes unnecessary details when shorter answers suffice. Paid plan users also get a reasoning slider across web, mobile, and desktop platforms. This control allows adjusting the level of processing ChatGPT applies to tasks like research, planning, writing, and coding.
Internal testing indicates that the newest models have lower rates of factual inaccuracies, according to company evaluations. These tests involved financial, medical, and legal prompts that require precise factual responses. Results showed approximately 62% fewer responses containing at least one factual error for GPT-5.6 Luna compared to GPT-5.5 Instant. GPT-5.6 Sol demonstrated an even more significant reduction of about 68%. The company also highlighted improvements in handling dates, numbers, sources, rules, and assumptions when these details influence an answer.
Safety Protocols Persist Despite Broader ChatGPT Access
The latest models incorporate enhanced protections for users identified as under 18. The safeguards cover areas such as romantic roleplay, age-restricted challenges, and claims that could substitute real-world relationships. Additional restrictions address sexual content, eating disorders, dangerous activities, restricted goods, and graphic violence. The company also introduced new assessments 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 concentrates on the core 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 with this release. Paid subscribers can access the latest Sol model and reasoning controls immediately. Free and Go users will see Luna as their default model this week. The unlimited text chats and Think button will roll out next week, while upload, image, and other tool limits will stay in place separately.