OpenAI Daybreak is our vision to change the way software is built and defended.

Daybreak is the first glimpse of sunlight in the morning. For cyber defense, it means seeing risk earlier, acting sooner, and helping make software resilient by design.

It starts from the premise that the next era of cyber defense should be built into software from the beginning by not only finding and patching vulnerabilities, but being resilient to them by design.

AI can now help defenders reason across codebases, identify subtle vulnerabilities, validate fixes, analyze unfamiliar systems, and move from discovery to remediation faster. Because those same capabilities can be misused, Daybreak pairs expanded defensive capability with trust, verification, proportional safeguards, and accountability.

The goal is simple: accelerate cyber defenders and continuously secure software.

Daybreak combines the intelligence of OpenAI models, the extensibility of Codex as an agentic harness, and our partners across the security flywheel to help make the world safer for everyone. Defenders can bring secure code review, threat modeling, patch validation, dependency risk analysis, detection, and remediation guidance into the everyday development loop so software becomes more resilient from the start.

In the coming weeks, we’re working with our industry and government partners as we prepare to deploy increasingly more cyber-capable models as part of our approach to iterative deployment.