# OpenAIGPT5.6

OpenAI released GPT-5.6 series with three models: Sol (flagship), Terra (balanced), and Luna (lightweight). Sol set a new SOTA of 91.9% on Terminal-Bench 2.1, surpassing Anthropic's Mythos 5. Pricing holds flat on Sol vs. GPT-5.5, half on Terra, and one-fifth on Luna. Due to the U.S. AI executive order, GPT-5.6 is currently limited to about 20 approved partners — general users don't have access yet.