SAN FRANCISCO, CALIFORNIA / RankWire.AI / – OpenAI is extending access to ChatGPT for Free and Go users by enabling unlimited text interactions powered by GPT-5.6 Luna. The company announced that this update will be rolled out next week and will include safeguards to prevent misuse. During this phase, GPT-5.6 Luna will be the default model for these users. Additionally, free-tier users will gain a Think button feature, allowing the model more time to analyze complex questions before delivering a response.
This unlimited text access is exclusive to ChatGPT conversations. Limits will still apply to other functions such as file uploads, image creation, and tools that involve extra processing. The Think feature will arrive alongside the expanded text allowance next week, enabling Luna to dedicate more time to reasoning prior to answering. Consequently, ChatGPT users on Free and Go plans will experience broader access to core chat functions, though not all features will be available for unlimited use.
GPT-5.6 comprises Luna, Sol, and Terra, each tailored for different levels of performance and computing needs. Luna is the faster, more cost-effective choice within this lineup. According to OpenAI, ChatGPT now reaches approximately one billion users weekly across activities like search, research, planning, and writing. With this latest update, Luna becomes the default experience for Free and Go accounts, while separate usage policies for other tools outside standard text conversations remain in place.
Paid plans benefit from new GPT-5.6 Sol management features
Subscribers to ChatGPT Plus and Pro are now able to access an enhanced version of GPT-5.6 Sol for their daily interactions. Sol is designed to provide quick responses as well as support deeper reasoning within paid subscriptions. The company explained that the updated model delivers more targeted replies and minimizes unnecessary details when shorter answers suffice. Furthermore, Plus and Pro users now have a reasoning slider available on web, mobile, and desktop platforms. This tool allows users to control how much processing ChatGPT applies to tasks such as research, planning, writing, and coding.
Internal testing indicated that these latest models also produce fewer factual inaccuracies. The evaluations, which assessed financial, medical, and legal prompts requiring detailed factual responses, showed roughly 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 reduction of about 68%. The company highlighted improvements in handling dates, numbers, sources, rules, and assumptions when these details influence the answer.
Safety protocols remain in place despite expanded access
Enhanced protections have been integrated into the latest models for users identified as under 18. The safeguards cover sensitive 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, prohibited items, and graphic violence. The company also introduced new assessment procedures for responses involving younger users. Unlimited text conversations for Free and Go accounts will continue to operate under the existing safeguards designed to prevent abuse.
This update primarily focuses on the main ChatGPT experience and does not alter other products utilizing GPT-5.6, such as ChatGPT Work and Codex, which remain unchanged under this release. Paid subscribers can now access the latest Sol model and reasoning controls. Meanwhile, Free and Go users will see Luna become the default model starting this week. The unlimited chat feature and Think button will be available next week, with other tools like uploads and images continuing under separate usage limits.