GPT-6 Astra crossed the Critical cyber line. OpenAI wrote the line, ran the test, and cleared the release
2026-09-05AI
Astra is the first model OpenAI says meets the Critical cybersecurity bar of its own Preparedness Framework: a perfect ExploitBench score, two previously unknown vulnerabilities found during evaluation, and a browser sandbox escape to command execution on the host. Every one of those judgments belongs to the company shipping it.
