[OpenAI: Free Users Can Enjoy Unlimited Text Chats with ChatGPT] OpenAI announced on Thursday that, with the latest update to the popular AI application ChatGPT, free users will no longer face restrictions on text interactions with the chatbot. At the same time, the default model for free users will be updated to GPT‑5.6 Luna. Even the lightweight version of the GPT-5.6 series, Luna, performs better than the current default model for free users, GPT-5.5 Instant. Additionally, free users and subscribers of the $8/month Go plan will gain access to the new 'Think' button. This button is designed to allow the AI to spend more time reasoning, enabling it to answer more complex questions.