Scaling Trusted Access for Cyber with GPT-5.5 and GPT-5.5-Cyber
How our latest models help each layer of the defensive ecosystem and accelerate the security flywheel.
TL;DR
- OpenAI has released GPT-5.5 and is introducing GPT-5.5-Cyber for specialized cybersecurity workflows.
- The Trusted Access for Cyber (TAC) framework verifies defenders and grants them enhanced AI capabilities for defensive tasks.
- GPT-5.5 is recommended for most defensive security workflows, while GPT-5.5-Cyber is for more specialized, high-risk tasks like red teaming.
- Phishing-resistant account security protections are required for TAC users, with stricter requirements coming in June 2026.
- The initiative aims to accelerate the security flywheel by partnering with various entities across the cybersecurity ecosystem, including network providers, vulnerability researchers, detection and monitoring services, and software supply chain security firms.
- Access to TAC is available for individual users via verification and for enterprises through their OpenAI representative.
- Future expansions of access are expected as identity verification, use-case scoping, and misuse monitoring improve.