OpenAI launches Daybreak cybersecurity platform to rival Anthropic

The platform uses OpenAI's GPT-5.5 models and Codex Security agent to find and patch software vulnerabilities before attackers can exploit them

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OpenAI has launched Daybreak, a cybersecurity initiative that uses its AI models and Codex Security agent to help organizations identify and fix software vulnerabilities, putting the company in direct competition with Anthropic's Project Glasswing.

OpenAI says it built Daybreak on the idea that security should be part of software from the start, not just an afterthought. The platform aims to speed up security analysis, generate and test patches within a project, and send results to clients with documentation ready for audits.

The initiative relies on three model tiers, OpenAI said: GPT-5.5 for general-purpose use, GPT-5.5 with Trusted Access........

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