OpenAI: GPT-5.6 Luna Free for ChatGPT Users

OpenAI is making its advanced AI more accessible. The company is rolling out GPT-5.6 Luna to free and Go ChatGPT users. Here's the thing: GPT-5.6 Luna is described as the fastest and most affordable model in its family. It's designed for high-volume and cost-sensitive tasks. OpenAI also offers GPT-5.6 Sol as its flagship and Terra as a balanced option. What's interesting is that free and Go users will also get a "Think button." This allows them to use GPT-5.6 Luna for more demanding questions, offering additional reasoning for complex requests. Paid users are getting more control over reasoning, with options varying by subscription plan. OpenAI says Luna delivers strong performance at a lower cost, good for many AI interactions. However, free users still have usage limits. This move shows OpenAI's strategy to bring capable AI to more people, balancing performance and cost across different plans. This matters because more people can now access more powerful AI tools.