GPT-5.6 Sol, Terra, and Luna: What OpenAI Just Shipped (and Why You Can’t Use It Yet)
OpenAI released GPT-5.6 on June 26, 2026, and it arrived split into three separate models. Sol is the flagship built for the hardest problems, Terra is the balanced workhorse, and Luna is the fast, low-cost option for everyday tasks. For the first time, a major American AI model launched behind a government-managed access list, available […]
