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On the silent battlefield of cybersecurity, the role of AI is undergoing a transformation. On June 23, OpenAI announced an upgrade to its "Daybreak" cybersecurity initiative, introducing a new AI model specifically designed for security researchers and defenders - GPT-5.5-Cyber. The release of this model marks that AI not only has the keen sense to "discover vulnerabilities," but also possesses the practical ability to "fix them with one click."
According to the latest technical benchmark tests, GPT-5.5-Cyber has shown dominance in multiple core areas. In the CyberGym test measuring vulnerability discovery capabilities, the model scored 85.6%, surpassing Claude Mythos5 (83.8%) and the standard version of GPT-5.5 (81.8%), helping OpenAI reclaim the top position in this field. Additionally, in the ExploitGym test, which focuses on converting known vulnerabilities into attack code, and the SEC-Bench Pro test for long-chain vulnerability discovery, its performance was also significantly ahead of the base model.
The purpose of OpenAI's development is to solve the current "limping" problem of security tools: many AI solutions can detect risks but often stop at the reporting stage, lacking the ability to assess and make substantial repairs. GPT-5.5-Cyber fills this gap. It can analyze deep-level code, not only accurately reconstructing attack paths, but also autonomously writing security patches for manual review. By directly integrating these results into existing vulnerability management systems, companies can greatly reduce the time window from "alert" to "strengthening."
This model's development is not a hollow achievement, but based on the accumulation of massive practical data. Since the release of the Codex Security tool in March of this year, it has processed over 30,000 code repositories and conducted security audits on more than 300 million code submissions. According to statistics, the system identified and collaborated to fix 70,000 vulnerabilities during this process, and automatically handled over 500,000 security reports.
