OpenAI Expands Daybreak With GPT-5.5-Cyber to Help Defenders Patch Security Flaws
Summary
OpenAI released an improved GPT-5.5-Cyber model and updated Codex Security plugin (a tool for finding and fixing code problems) to help security defenders find and patch software vulnerabilities more quickly. The company is also launching Patch the Planet, a partnership with Trail of Bits to secure open-source projects, because AI models are now finding vulnerabilities faster than developers can fix them, shifting the bottleneck from discovery to patching.
Solution / Mitigation
OpenAI is providing the improved GPT-5.5-Cyber model to trusted defenders as part of the Daybreak initiative. The updated Codex Security plugin allows developers to run deep scans, generate reports with severity levels and affected code locations, generate codebase-specific patches for review, and facilitate patch generation at scale. The Patch the Planet initiative lets security engineers review and validate findings, work with projects to develop patches and tests, and help build reusable vulnerability discovery workflows.
Classification
Affected Vendors
Related Issues
Original source: https://thehackernews.com/2026/06/openai-expands-daybreak-with-gpt-55.html
First tracked: June 23, 2026 at 02:00 AM
Classified by LLM (prompt v3) · confidence: 85%