GPT-6 Cyber

OpenAI's cybersecurity-specialized variant of GPT-6 Astra, launched Nov 5 2026 as the successor to GPT-5.6 Cyber for authorized vulnerability discovery, exploit development and pentesting. OpenAI reports 48.5% on ExploitGym (vs 32.1% for GPT-5.6 Cyber) and out-of-scope exploitation avoided in 99.93% of tests without a deployment prompt; it was used to develop 948 Linux privilege-escalation exploits and find 81 previously unknown high-severity Firefox vulnerabilities. Rated Critical in cybersecurity under OpenAI's Preparedness Framework. Access is gated: initially available through the API and Codex to select approved Daybreak Red customers, expanding to all Daybreak Red customers soon. Listed at $20 / $100 per 1M input/output tokens. Size undisclosed; weights not released.