What happened
On June 22, 2026, OpenAI launched the full version of GPT-5.5-Cyber (more capable and permissive than the earlier preview) to vetted defenders via a limited release with extra monitoring, updated its Codex Security plugin to accelerate end-to-end vulnerability discovery and patch automation, and introduced 'Patch the Planet' — a joint initiative with Trail of Bits deploying security engineers and frontier models to find and fix flaws across 30+ critical open-source projects. OpenAI simultaneously launched the Daybreak Cyber Partner Program, with IBM, Cato Networks, and Check Point among early joiners.
Why it matters
OpenAI is pivoting from vulnerability discovery to patch automation at scale, with a specialized model now accessible to enterprise defenders and a structured OSS patching program that combines AI triage with human expert review — materially shifting the speed-to-remediation curve for critical open-source infrastructure.
Applicability
Vetted enterprise security teams, MSSPs, and OSS maintainers should apply for Daybreak program access now; Codex Security plugin is available to existing ChatGPT/API users.