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ATLAS OWASP MEDIUM Moderate risk · Monitor closely SecurityWeek ▲ 6.5

OpenAI Widens Access to Cybersecurity Model After Anthropic’s Mythos Reveal

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 …

AML.T0047 - ML-Enabled Product or Service AML.T0054 - LLM Jailbreak AML.T0040 - ML Model Inference API Access