OpenAI Removes Text Limits for Free ChatGPT Users and Rolls Out Model Upgrades

OpenAI announced a major update to its ChatGPT platform, eliminating limits on text-based conversations for free tier users. The update introduces a 'Think' feature to process complex reasoning tasks and upgrades the default model to GPT-5.6 Luna for general users. Concurrently, paid subscribers gained access to GPT-5.6 Sol, an upgraded model offering higher factual accuracy, improved source attribution, and customizable control sliders for reasoning depth prior to response generation.