OpenAI is rolling out the full, limited-release version of GPT-5.5-Cyber—a specialized AI model that outperforms its predecessors and Claude Mythos 5 in security benchmarks like CyberGym.
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Built upon OpenAI's frontier models and utilizing Codex as an agentic execution layer, Daybreak enables security teams to identify, validate, and remediate vulnerabilities quickly than before.
GPT-5.5-Cyber is specifically engineered for high-risk, specialized workflows. Available in a limited preview for critical infrastructure defenders.
