GPT-5.6-Cyber

GPT-5.6-Cyber, released August 10, 2026, was OpenAI's most capable and most permissive security model at the time: a GPT-5.6 Sol derivative trained for zero-day discovery and exploit-chain development, and tuned to answer the sensitive queries general models refuse. At launch OpenAI reported it completed 95% of advanced cybersecurity requests, against 1.5% for GPT-5.6 Sol and 57.3% for its predecessor GPT-5.5-Cyber; in pre-release testing it found two previously unknown, chainable vulnerabilities in Chrome's V8 engine.

OpenAI rated the model High for cybersecurity under its Preparedness Framework, below the Critical threshold, and restructured Daybreak around it: a Blue tier offering GPT-5.6 Sol without system-level cyber guardrails for defensive work, and a Red tier gating GPT-5.6-Cyber itself behind identity verification, monitoring, and legal declarations for vulnerability research and exploit validation. Partners including CrowdStrike, Cisco, IBM, and Palo Alto Networks were cleared to build the models into security products at launch.