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Google announces Gemini 4 Carbon cybersecurity frontier model with restricted defender access (28 Oct 2026)

Google announced Gemini 4 Carbon Oct28 with limited rollout to selected cybersecurity defenders via Fairwind, not general public/API availability. Google reports SEC-bench Pro 88.2%, ExploitGym 54.8%, CWE-bench 71%, improved long-horizon software engineering and safety. These are vendor-reported benchmarks and do not establish independently measured security or deployment outcomes; pre-release U.S. government testing described as voluntary process.