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<\/a><\/p>\nOpenAI on Tuesday\u00a0unveiled GPT-5.4-Cyber, a variant of its latest flagship\u00a0model, GPT\u20115.4<\/a>, that’s specifically optimized for defensive cybersecurity use cases, days after rival Anthropic unveiled its own frontier\u00a0model, Mythos<\/a>.<\/p>\n “The progressive use of AI accelerates defenders \u2013 those responsible for keeping systems, data, and users safe \u2013 enabling them to find and fix problems faster in the digital infrastructure everyone relies on,”\u00a0OpenAI said<\/a>.<\/p>\n In conjunction with the announcement, the artificial intelligence (AI) company said it’s ramping up its Trusted Access for Cyber\u00a0(TAC<\/a>) program to thousands of authenticated individual defenders and hundreds of teams responsible for securing critical\u00a0software.<\/p>\n AI systems are inherently dual-use, as bad actors can repurpose technologies developed for legitimate applications to\u00a0their own advantage and achieve malicious\u00a0goals. One core area of concern is that adversaries could invert the models fine-tuned for software defense to detect and exploit vulnerabilities in widely-used software before they\u00a0can be\u00a0patched, exposing users to significant\u00a0risks.<\/p>\n OpenAI said the goal is to democratize access to its models while minimizing such\u00a0misuse, as well\u00a0as strengthening its safeguards through a deliberate, iterative\u00a0rollout. The idea is to enable responsible use at scale, give defenders a head start,\u00a0and simultaneously shore up guardrails against jailbreaks and adversarial prompt injections as model capabilities become more\u00a0advanced.<\/p>\n “As model capabilities advance, our approach is to scale cyber defense in lockstep: broadening access for legitimate defenders while continuing to strengthen safeguards,” the company\u00a0added.<\/p>\n