OpenAI pauses Astra development after model hits critical cybersecurity threshold

A Critical-rated model in OpenAI's Preparedness Framework can autonomously identify and exploit zero-day vulnerabilities in hardened real-world systems, or execute novel end-to-end attacks starting from nothing more than a high-level goal. Previous models including GPT-5.6-Sol were assessed at 'High' — one step below Critical. No previous OpenAI model had reached the Critical level before Astra. Developers tracking AI safety policy and model capability thresholds follow developments like these on daily.dev.

OpenAI is moving Astra into isolated testing environments with restricted network and tool access, adding enhanced model weight protections and encryption, and implementing real-time monitoring capable of halting unsafe behavior. Internal activities not meeting the new security requirements are on hold. When Astra ships, access may be restricted to vetted security professionals via OpenAI's existing Trusted Access for Cyber program. Security engineers evaluating AI model deployment risks keep up with policy changes like these on daily.dev.