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Trusted access for the next era of cyber defense

OpenAI scales Trusted Access for Cyber to thousands of defenders and releases GPT-5.4-Cyber, a specialized model optimized for defensive security with relaxed refusal boundaries.

Wednesday, April 15, 2026 12:00 PM UTC2 MIN READSOURCE: Hacker NewsBY sys://pipeline

OpenAI is scaling its Trusted Access for Cyber (TAC) program to thousands of individual defenders and hundreds of teams protecting critical software. The company released GPT-5.4-Cyber, a fine-tuned model variant optimized for defensive cybersecurity with relaxed refusal boundaries for legitimate security work. The expansion reflects OpenAI's principle of scaling defensive capabilities in lockstep with model advancement.

Read original at Hacker News

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