OpenAI Makes GPT‑5.6 Luna Free‑User Default, Adds ‘Think’ Button for Deep Reasoning
OpenAI switched Free and Go tier users to GPT‑5.6 Luna as the default model, lifting the text‑chat limit and giving everyone unlimited conversations. A new ‘Think’ button lets users tap higher‑order reasoning on demand, while Plus/Pro users get an upgraded GPT‑5.6 Sol with tighter answers and a reasoning slider. The change expands premium‑level AI to the masses.