Widescreen Fello AI article thumbnail with the headline “CHATGPT 5.6 IS LIVE” in bold amber and white text, next to a glowing ChatGPT-style emblem surrounded by three orbital spheres representing Sol, Terra, and Luna on a dark navy tech background.

ChatGPT 5.6 Is Live: Sol, Terra, and Luna Explained

GPT-5.6 has been generally available since July 9, 2026, the day OpenAI ended a two-week lockdown that had limited the model to roughly 20 US-government-vetted organizations. The US Commerce Department’s Center for AI Standards and Innovation completed its review and cleared wider access to all three models in the family, Sol, Terra, and Luna. So […]