GPT-6 Astra
OpenAI's flagship model, released in September 2026 with computer-use skills and added cybersecurity safeguards.
Definition
GPT-6 Astra is OpenAI's flagship model, released to trusted partners on September 3, 2026 and to paying users the next day. OpenAI describes it as its most capable and best-aligned model yet, beating both its predecessor GPT-5.6 Sol and rival Claude Fable on major reasoning benchmarks, and highlights 'computer use' — navigating a computer's screen and apps the way a person would — as a headline feature. During development, Astra's evaluated abilities crossed what OpenAI calls a critical capability threshold for cybersecurity, meaning it could independently find and carry out cyberattacks against well-defended real-world systems; OpenAI responded by adding stricter safeguards, restricting some cybersecurity-related capabilities in the general release, and giving first access to an application-based cybersecurity program. It followed a delay after a mid-2026 Hugging Face security incident prompted OpenAI to add further safeguards before shipping.