Frontier AI for defenders.
Building the future of cyber defense
OpenAI Daybreak brings together frontier cyber models, Codex Security, trusted workflows, and ecosystem partnerships to help defenders keep pace with an accelerating threat landscape: finding, validating, and fixing vulnerabilities before attackers can exploit them.
The bottleneck in cybersecurity is shifting. AI can now help uncover more security issues across large, complex codebases, but reports alone do not make systems safer. Real protection comes from validated findings, tested patches, coordinated disclosure, maintainer review, and fixes that actually land.
Daybreak is built to accelerate that full remediation loop, working with the world’s leading cyber organizations as partners to bring trusted defensive capability into the tools, services, and workflows security teams already rely on. Through Codex Security, Patch the Planet, GPT‑5.5‑Cyber, and the Daybreak Cyber Partner Program, developers, maintainers, researchers, enterprises, and public institutions can turn frontier AI capability into measurable risk reduction.
This work has to happen responsibly. Daybreak is designed around authorization, human judgment, monitoring, safeguards, and collaboration with the broader security community. Advanced access is available for verified defenders through Trusted Access for Cyber, pairing more capable and permissive defensive tools with stronger verification, scope controls, and oversight.
Deploy frontier cyber intelligence with Codex and the @CodexSecurity plugin
Ways to get started
Start a scan with the @CodexSecurity plugin
Best for trying the workflow, reviewing a branch or investing one codebase.
Continuously scan GitHub repositories with Codex Cloud
Best for trying the workflow, reviewing a branch or investing one codebase.
Contact Cyber sales
Best for scanning multiple codebases, deploying across teams, advanced model access, custom integrations, compliance review, and rollout planning with OpenAI cyber experts.
Controlled Access Models
Some advanced cyber capabilities require a controlled access process. Through Trusted Access, approved teams can use these models in scoped environments with authorization, logging, verification, and stronger controls for higher-risk defensive workflows.
Access | What changes | Intended use cases | Designed for | Availability |
GPT‑5.5 (default) | Available by default, with strong capabilities for everyday secure development and most code security workflows in @CodexSecurity. | Secure coding, secure code review, vulnerability discovery and triage, remediation guidance, dependency risk analysis, patch validation. | All developers and application security teams | |
GPT‑5.5 with Trusted Access for Cyber | Specialized access for advanced defensive security workflows in authorized environments, with more precise controls for higher-risk analysis. | Advanced vulnerability triage, malware analysis, detection engineering, security investigations, incident analysis, complex defensive validation. | Cyber teams conducting advanced defensive work, cyber product vendors, system integrators, cyber consultancies, DevSecOps teams | |
GPT‑5.5‑Cyber | Preview access for specialized authorized testing workflows, with additional verification, scoping, logging, and controls. | Authorized red teaming, penetration testing, exploit validation, controlled security testing | Cyber teams and vendors conducting authorized red teaming, penetration testing, exploit validation, and controlled security testing. |
Trusted by leading security organizations
“We’re excited about the potential of OpenAI’s cyber capabilities to bring stronger reasoning and more agentic execution into security workflows. It’s a big step forward for teams to be able to leverage frontier models not only to accelerate velocity, but also to improve their security posture.”
Become a Daybreak partner
Work with OpenAI to bring trusted, AI-powered cyber defense to more organizations through your products, services, and expertise.
