OpenAI just released its answer to Claude Mythos

OpenAI launched Daybreak, a security initiative that uses the Codex Security AI agent released in March to model an organization’s code, validate likely vulnerabilities, and automate detection of higher-risk issues before attackers find them.

Why it matters: HKR-H/K/R all pass: Daybreak has a rivalry hook, concrete agent workflow, and code-security resonance. It is narrower than a model or ChatGPT capability release, so it stays in the 78–84 band.