OpenAI has announced a major update to ChatGPT, expanding access to advanced AI capabilities for users across its Free, Go, Plus, and Pro plans. The update introduces unlimited text-based conversations for Free and Go users, along with new GPT-5.6 models designed to deliver stronger reasoning, improved accuracy, and more reliable responses.
The announcement comes as ChatGPT continues to scale its global user base, with the AI platform now surpassing one billion weekly active users. The latest changes are aimed at making advanced conversational AI more accessible while giving users greater control over how the system handles complex tasks.
Unlimited text conversations for Free and Go users
Under the new update, Free and Go users will be able to engage in unlimited text-based conversations with ChatGPT. The feature is designed to provide users with greater flexibility for everyday tasks such as information search, writing, learning, planning, brainstorming, and general problem-solving.
However, unlimited access applies specifically to text conversations. Separate usage limits will continue to apply to features including file uploads, image uploads, voice interactions, and image generation.
GPT-5.6 Luna becomes the default model
The latest GPT-5.6 Luna model will become the default model for Free and Go users, replacing GPT-5.5. The new model is designed to improve response quality while providing stronger performance across a broad range of everyday use cases.
OpenAI is also introducing a new โThinkโ option for Free and Go users. The feature allows users to manually select a higher reasoning mode when dealing with more complex questions or tasks that require additional analysis.
This gives users the flexibility to choose between faster responses for routine queries and deeper reasoning for more demanding problems.
Advanced reasoning comes to Plus and Pro
Plus and Pro subscribers will receive access to the upgraded GPT-5.6 Sol model, which is positioned as a more advanced option for complex professional and knowledge-intensive workloads.
According to OpenAI, GPT-5.6 Sol has been optimized for tasks including answering questions, conducting web research, providing advice, planning, writing, and supporting decision-making.
The company says the model is designed to produce responses that are more concise and robust compared with its predecessor, potentially improving the experience for users who rely on ChatGPT for professional and productivity-focused tasks.
New thinking controls offer greater flexibility
Plus and Pro users will also receive a new thinking slider that allows them to control the amount of reasoning effort applied by the model.
The feature is intended to give users greater control over performance depending on the nature of their task. Users can opt for quicker responses when working on straightforward requests or increase reasoning effort when tackling more complicated problems.
Focus on accuracy and reliability
OpenAI says its internal evaluations show improvements in the accuracy of both GPT-5.6 Luna and GPT-5.6 Sol compared with GPT-5.5-Instant.
According to the company's evaluation results, factual errors were reduced by 62% with GPT-5.6 Luna and by 68% with GPT-5.6 Sol compared with the previous model.
These improvements are aimed at addressing one of the most important challenges facing generative AI: delivering useful responses while reducing factual inaccuracies and improving reliability.
Expanding access to advanced AI
The latest ChatGPT update reflects OpenAI's broader effort to make more capable AI accessible across different subscription tiers while introducing greater control over reasoning and usage.
For Free and Go users, unlimited text conversations and access to the new Think mode represent a significant expansion of functionality. Meanwhile, Plus and Pro subscribers gain more advanced reasoning capabilities through GPT-5.6 Sol and additional controls for adjusting reasoning effort.
With ChatGPT's user base continuing to expand, the latest changes underline the growing emphasis on balancing accessibility, model performance, reasoning capabilities, and reliability as AI becomes increasingly integrated into everyday and professional workflows.
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