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GPT-5.4-Cyber Expansion Raises LLM Jailbreak Dual-Use Risks

GPT-5.4-Cyber Expansion Raises LLM Jailbreak Dual-Use Risks

ATLAS OWASP MEDIUM Moderate risk · Monitor closely ▲ 6.5 SecurityWeek

OpenAI has expanded access to GPT-5.4-Cyber, a fine-tuned model designed for defensive cybersecurity applications, following Anthropic's reveal of its Mythos cybersecurity model. While framed as a defensive tool for legitimate security practitioners, the widened access to a capability-enhanced cybersecurity LLM raises dual-use concerns around potential misuse for offensive operations. The competitive dynamic between major AI labs in the security-focused model space signals a broader industry trend that warrants careful access control and policy scrutiny.

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