OpenAI ships GPT-6 Astra in a restricted form, its first cyber-critical model

On September 3, 2026, OpenAI unveiled GPT-6 Astra, the first model it classifies as ‘critical’ for cybersecurity under its Preparedness Framework, then released a public version the next day that refuses offensive requests. For defenders, the full capabilities sit behind the Daybreak Blue program, not the public API.