SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is broadening access to ChatGPT for users on Free and Go subscriptions by offering unlimited text interactions powered by GPT-5.6 Luna. The company announced this update will roll out next week and will include safeguards to prevent misuse. During this phase, GPT-5.6 Luna is becoming the standard model for these users. Additionally, Free users will gain a Think button, allowing the model more time to process complex questions before providing an answer.
This unlimited feature applies solely to text-based conversations within ChatGPT. Users will still face separate limits on file uploads, image creation, and other tools that demand extra processing. The introduction of the Think button will coincide with the expanded text allowance next week, enabling Luna to spend more time reasoning prior to generating responses. Consequently, ChatGPT users on Free and Go plans will enjoy enhanced access to the core chat functions without unlimited usage of every tool.
GPT-5.6 comprises Luna, Sol, and Terra, each tailored for different performance levels and computational needs. Luna is positioned as the faster and more cost-effective option in this family. OpenAI noted that ChatGPT now reaches approximately one billion users weekly across search, research, planning, writing, and other tasks. This latest deployment places Luna as the default for standard experiences on Free and Go accounts, while separate usage policies remain for tools outside typical text conversations.
Enhanced GPT-5.6 Sol controls now available for paid subscribers
Subscribers of ChatGPT Plus and Pro are now receiving an updated version of GPT-5.6 Sol to enhance their daily interactions. Sol supports both quick responses and more detailed reasoning within paid tiers. The company stated that this revised model delivers more precise replies and avoids unnecessary details when brief answers suffice. Plus and Pro members also now have access to a reasoning slider across web, mobile, and desktop platforms. This feature allows users to adjust how much processing ChatGPT applies to tasks like research, planning, writing, and coding.
Internal testing indicated a decrease in factual inaccuracies with the newest models. The evaluations focused on prompts related to finance, medicine, and law that demand accurate, detailed answers. Results revealed approximately 62% fewer responses with at least one factual error for GPT-5.6 Luna compared to GPT-5.5 Instant. Similarly, GPT-5.6 Sol demonstrated a reduction of about 68% in factual errors under the same testing methodology. The company also reported improvements in handling dates, numbers, sources, rules, and assumptions when such details impact responses.
Safety protocols remain in place across the expanded ChatGPT platform
The latest models feature 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 include boundaries concerning sexual content, eating disorders, dangerous activities, restricted goods, and graphic violence. The company mentioned the introduction of new assessments for responses involving younger users. Unlimited text conversations on Free and Go plans will continue to operate within the existing safety measures against abuse.
This update emphasizes the core ChatGPT experience and does not alter every product utilizing GPT-5.6. The GPT-5.6 Sol variants used in ChatGPT Work and Codex remain unchanged under 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 chat and Think button features are scheduled for next week, while uploads, images, and other tools will continue to have separate usage restrictions.