OpenAI has expanded its Daybreak cybersecurity initiative to address a critical industry bottleneck: the transition from vulnerability discovery to active patching. While artificial intelligence has dramatically accelerated the identification of software flaws, the remediation phase remains a manual, resource-intensive challenge. Daybreak aims to democratize machine-speed patching by integrating frontier AI capabilities directly into defensive security workflows. Central to this expansion is the full release of GPT-5.5-Cyber, a specialized model optimized for authorized cybersecurity operations. The model achieves a new state-of-the-art benchmark of 85.6 percent on CyberGym and demonstrates significant improvements on real-world exploit and proof-of-concept generation tests. Coupled with an updated Codex Security plugin, OpenAI has engineered a continuous remediation loop that scans codebases, traces attack paths, validates findings, and generates targeted patches. These tools export directly to existing vulnerability management systems, allowing developers to triage and fix issues without leaving their integrated development environments. To scale these capabilities across the security ecosystem, OpenAI announced the Daybreak Cyber Partner Program. This initiative grants verified security providers trusted access to deploy defensive AI models within their customer-facing products. Simultaneously, the company launched Patch the Planet, a collaborative effort with Trail of Bits and HackerOne focused on strengthening open-source infrastructure. By funding expert researchers to work directly with maintainers of major projects like cURL, Go, and Python, the program automates vulnerability deduplication and patch validation, significantly reducing the manual burden on volunteer development teams. The rollout also encompasses coordinated international efforts. OpenAI has established Trusted Access for Cyber partnerships with government entities across Australia, Canada, France, Germany, Japan, South Korea, and European institutions, alongside ongoing alignment with U.S. federal agencies and executive directives on AI safety. All deployments operate under strict governance, utilizing scoped controls, continuous monitoring, and mandatory human oversight to prevent misuse. By unifying advanced language models, automated remediation tools, and strategic public-private partnerships, Daybreak shifts the cybersecurity paradigm from passive reporting to proactive defense. The initiative positions AI as a force multiplier for human defenders, aiming to harden global digital infrastructure and accelerate the deployment of critical software fixes across enterprise, open-source, and government networks.