OpenAI launches GPT-5.5-Cyber and Codex Security

OpenAI's pivot toward agentic, defensive cybersecurity tools like GPT-5.5-Cyber and Codex Security shows that AI security has moved past basic threat reporting into autonomous, end-to-end remediation.

• –By combining sandboxed vulnerability validation with automated patch generation, Codex Security addresses the main bottleneck of security teams: false positives and slow remediation times.
• –The "Patch the Planet" initiative and partnerships with security heavyweights like Trail of Bits and HackerOne suggest OpenAI is actively trying to gain trust and credibility in the defensive security community.
• –Providing specialized cyber models with trusted access indicates a growing trend of custom, task-specific LLMs designed for regulated and high-stakes fields like cybersecurity.