OpenAI has announced GPT-5.5 and a specialized variant, GPT-5.5-Cyber, expanding its Trusted Access for Cyber program to give vetted security professionals access to AI tools aimed at accelerating defensive work, according to the company's announcement.
A Specialized Tool for Digital Defense
GPT-5.5-Cyber is a version of the GPT-5.5 foundation model adapted for cybersecurity tasks. Per OpenAI's announcement, its intended uses include helping researchers analyze code for vulnerabilities, assist with reverse-engineering suspicious software, and support incident-response workflows — tasks meant to reduce the manual analysis burden on human security teams.
The Trusted Access Program
Access to GPT-5.5-Cyber is restricted to participants in OpenAI's Trusted Access for Cyber program. OpenAI describes this as a vetting process intended to limit the model's use to legitimate defensive research and prevent misuse for offensive purposes. The company has not published a full list of participating organizations.
Accelerating the Pace of Protection
OpenAI states that a goal of the program is to shorten the gap between vulnerability discovery and remediation — the window attackers typically exploit before patches are deployed. The model is positioned as a way to help defenders synthesize threat intelligence and flag weaknesses in code more quickly than manual review alone.
The expansion reflects a broader trend of AI labs building specialized, gated tools for security applications rather than relying solely on general-purpose models, though OpenAI's announcement does not provide performance benchmarks or a timeline for wider availability.