Key facts
- OpenAI is removing all limits on text-based chats for ChatGPT users.
- The GPT-5.6 Luna model will be the default for Free and Go users.
OpenAI is eliminating limits on text-based conversations for all ChatGPT users, powered by the new GPT-5.6 Luna model. Paid users will receive an upgraded GPT-5.6 Sol model and a "thinking slider" for complex queries.

These updates significantly enhance the accessibility and capability of ChatGPT, particularly for free users, while offering advanced features to paid subscribers, potentially increasing user engagement and competition in the AI chatbot market.
OpenAI has announced significant updates to its ChatGPT service, including the removal of all limits on text-based chats for its free users. This change aims to enhance the experience for the platform's over 1 billion weekly users.
The new GPT-5.6 Luna model will now serve as the default for Free and Go tier users, replacing the previous GPT-5.5 model. These users will also gain access to a new "Think" button, designed to provide higher reasoning capabilities for more complex queries. OpenAI clarified that limits will still apply to interactions involving files, images, voice, and image generation.
Subscribers on the Plus and Pro tiers will benefit from an upgraded GPT-5.6 Sol model, which is optimized for rapid tasks such as research, advice, planning, and writing, promising more concise and robust answers. Notably, this version of GPT-5.6 Sol is distinct from the one used for Codex and Work. Additionally, Plus and Pro users will receive a "thinking slider" feature, allowing them to adjust the depth and complexity of the model's responses based on the query.
According to OpenAI's internal evaluations, the GPT-5.6 Luna model demonstrated a 62% reduction in factual errors compared to GPT-5.5-Instant, while GPT-5.6 Sol showed a 68% decrease. The updated GPT-5.6 Sol model is available immediately for Plus and Pro users, with the broader changes for Free and Go users rolling out this week. Unlimited text chats and the "Think" button are expected to be accessible to all users next week.