OpenAI Gates GPT-6 Astra's Zero-Day Exploit Capability Over Critical Security Risk

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OpenAI released GPT-6 Astra on September 3, marking the first time the company has rated a model 'Critical' for cybersecurity risk. The model can autonomously discover zero-day vulnerabilities in hardened systems and generate working exploits without human guidance. While the broader model is publicly available, this specific offensive capability is restricted to vetted users through a split-access system — a governance approach OpenAI has not used before. Experts note that gating slows the spread of dangerous capabilities but does not eliminate the risk, as demonstrated capabilities tend to reach adversaries over time through other labs or leaks. Security professionals are advised to prioritize faster patching cycles, reduce forgotten or orphaned attack surfaces, and invest in anomaly detection rather than assuming the gate alone provides lasting protection.

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