OpenAI has announced unlimited text chats with GPT‑5.6 Luna for free users. “For questions that need more thought, a new Think button lets you access higher reasoning for harder questions,” as per the ...

ChatGPT has become so much more than just chat over the last year. To that end, OpenAI is removing limits on text chat. ChatGPT will also improve with a smarter version of GPT-5.6 Sol. Details below.