ChatGPT free users get unlimited access to Luna

openai.com ↗Improving gpt sol in chatgpt

ChatGPT free users now get access to Luna. This is actually quite crazy, considering the fact that Luna is a pretty decent model for a variety of normal, everyday tasks, that people now get access to Luna for free. I can’t believe that we are living in this world:

We’re expanding access to our latest models for free users with unlimited text chats using GPT‑5.6 Luna, plus a new Think button for harder questions.

For questions that require deeper reasoning, Free users can tap the new Think button to give GPT‑5.6 Luna more time to work through the answer.