OpenAI Makes GPT-5.6 Luna the Default Model for Free ChatGPT Users

OpenAI has announced a major update to ChatGPT by making GPT-5.6 Luna the default model for all Free users. The change is designed to deliver faster responses, stronger reasoning, and more reliable factual accuracy compared with the previous default model. Alongside the rollout, OpenAI has also removed daily limits on text conversations for free users, allowing unlimited text chats while maintaining separate limits for features such as image generation, file uploads, and voice interactions.

The company also introduced improvements to GPT-5.6 Sol, its flagship model available to Plus and Pro subscribers. Sol now provides more focused responses, improved factual reliability, and greater consistency across a wide range of tasks, from casual conversations to research, planning, coding, and writing. In addition, paid users now have access to a new reasoning slider that lets them control how much time the model spends thinking before responding, offering a balance between speed and deeper analysis.

According to OpenAI, GPT-5.6 Luna is designed to deliver high-quality AI performance at significantly lower computational cost. The model is optimized for fast interactions while maintaining strong reasoning and language capabilities, making it well suited for everyday conversations and high-volume use. The rollout is part of OpenAI’s broader strategy to make advanced AI more widely accessible without sacrificing performance or reliability.

The update arrives amid intensifying competition in the AI industry, with rivals including Google, Anthropic, and several Chinese AI developers rapidly improving their own models. By expanding premium-quality AI features to free users while enhancing capabilities for paid subscribers, OpenAI aims to strengthen ChatGPT’s position as one of the world’s leading AI assistants. Industry analysts believe the move could encourage broader adoption of AI tools while raising expectations for performance across the entire AI market.

OpenAI’s latest changes highlight a growing industry trend toward making increasingly powerful AI models more accessible to everyday users. As the company continues refining its GPT-5.6 family, the combination of unlimited text chats for free users, improved flagship capabilities for subscribers, and lower operating costs signals another major step toward bringing advanced artificial intelligence to a broader global audience.