Scaling Trusted Access for Cyber with GPT-5.5 and GPT-5.5-Cyber
OpenAI, Thursday, May 7th, 2026
How our latest models help each layer of the defensive ecosystem and accelerate the security flywheel.
For years we've been chronicling our work to accelerate cybersecurity defenders, as part of our broader work to build the core infrastructure for AI. Last week, we released our action plan Cybersecurity in the Intelligence Age, which lays out our vision for democratizing AI-powered defense.
Two weeks ago, we released GPT-5.5, our smartest and most intuitive model to date, which is already delivering powerful cybersecurity capabilities to developers and security teams through Trusted Access for Cyber (TAC).
Today, we are rolling out GPT-5.5-Cyber in limited preview to defenders responsible for securing critical infrastructure to support specialized cybersecurity workflows that help protect the broader ecosystem.