Today, OpenAI has announced that ChatGPT users on the free version (as well as the cheapest Go paid tier) will get unlimited text chats with no automatic switching to a lesser model. Speaking of models, GPT-5.6 Luna, the smallest of the three GPT-5.6 models released in July, will become the default for the free and Go users, taking over from the ancient (in AI terms) GPT-5.5 Instant.The switch to GPT-5.6 Luna will take place at some point this week, while the unlimited text chats will be available next week, which is also when free and Go users will get access to a new Think button. This...