The cyber AI parity window now has a deadline

Summary

In April the author wrote about the Cyber AI Parity Window, a period when defenders and attackers gained access to the same AI technology at roughly the same time. Five months later, OpenAI's Greg Brockman described a "defender's window," warning that open-weight models with significant cyber capabilities are only months behind frontier systems. The article argues that CISOs should convert that access into institutional capability by measuring AI performance on security workflows such as alert investigation.

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