OpenAI unveils GPT-5.6 Sol, Terra and Luna models — but only accessible to limited preview partners for now, per US Gov

OpenAI has introduced the GPT-5.6 AI model family, consisting of Sol, Terra, and Luna variants tailored for different enterprise needs. The models are initially available to a limited group of partners due to US government regulations. Sol is designed for complex tasks, Terra for high-volume business operations, and Luna for everyday use. The models offer improved performance over previous versions, with Sol showcasing record-high scores in benchmark tests. OpenAI has implemented safety measures like prompt caching and real-time security checks. The phased release strategy aligns with government directives, emphasizing the intersection of AI development with national security concerns.