GPT-6 Astra can perform tasks at a PhD level or higher, correct its own errors, and has demonstrated cross-domain mastery in areas like art and music

OpenAI's frontier reasoning model, released in September 2026 with a one-million-token context window and state-of-the-art results on computer use, browsing, software engineering and cybersecurity. It is the first model OpenAI rates Critical for cyber capability under its Preparedness Framework, and ships with safeguards that refuse advanced offensive security tasks.