OpenAI announced changes for free and paid ChatGPT users, including making GPT-5.6 Luna the default model, expanding free text access and adding user controls for reasoning effort. Paid tiers are also receiving an updated GPT-5.6 Sol experience. OpenAI announced the changes Thursday. GPT-5.6 Luna is scheduled to become the default model for all users.
Free and Go users are to receive unlimited text chats. Those users are also to receive a Think button for harder questions. The source record attributes statements, allegations and official descriptions to the people or institutions making them.
Frontier labs increasingly differentiate products by latency, reasoning and price. Default-model changes affect more users than optional model launches. Company quality claims require independent evaluation across tasks. This background supplies chronology and operating context without deciding the outcome still under review.
Plus and Pro users are to receive an updated GPT-5.6 Sol. OpenAI said the paid experience will include a slider controlling reasoning effort. Counts, dates and legal status remain tied to the checked source record because later reporting can revise preliminary information.
The evidentiary limit is specific: The rollout was not complete, and the report did not independently validate OpenAI's error-rate claims. The available reporting does not support an inference beyond that boundary.
The next record points are availability across free and paid accounts and independent evaluations of quality, latency and usage limits. Each can be checked against later official documents or independent reporting.
The verified chronology is therefore limited to the following: OpenAI announced the changes Thursday. GPT-5.6 Luna is scheduled to become the default model for all users. Free and Go users are to receive unlimited text chats. Those users are also to receive a Think button for harder questions. Plus and Pro users are to receive an updated GPT-5.6 Sol. OpenAI said the paid experience will include a slider controlling reasoning effort. The relevant context is Frontier labs increasingly differentiate products by latency, reasoning and price. Default-model changes affect more users than optional model launches. Company quality claims require independent evaluation across tasks. These details state what the sources establish and preserve what remains unknown.