GPT-5.5-Cyber is here. What it means for defenders operating at the frontier.
Summary
OpenAI has released GPT-5.5 and a preview of GPT-5.5-Cyber, providing verified defenders access to frontier AI. Sophos is utilizing these models to enhance its agentic SOC, which already resolves over half of cases autonomously, and to fortify its endpoint architecture against AI-generated zero-days.
IFF Assessment
This article discusses advancements in AI that are being made available to defenders to improve their capabilities and develop better defenses.
Defender Context
The release of advanced AI models like GPT-5.5-Cyber signifies a significant shift in the capabilities available to cybersecurity defenders. Organizations should explore how these tools can automate threat detection and response, and investigate new defensive architectures designed to counter AI-generated threats.