OpenAI Ships GPT-5.4-Cyber, a Frontier Model Fine-Tuned for Cybersecurity Defense

OpenAI is rolling out a specialized version of GPT-5.4 fine-tuned for cybersecurity workflows, available through a tiered Trusted Access program for authenticated defenders.

OpenAI announced an expanded rollout of GPT-5.4-Cyber, a version of its frontier model specifically fine-tuned for cybersecurity defense, as shared by @OpenAI. The model is available through a Trusted Access program that requires authentication, with tiered access levels for different security practitioners.

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