
OpenAI says new GPT-5.5-Cyber outperforms Anthropic's Mythos on cybersecurity benchmark
OpenAI is consolidating its cybersecurity AI strategy through GPT-5.5-Cyber, a specialized model that reportedly outperforms Anthropic's competing Mythos offering on security benchmarks. The shift from vulnerability detection to automated patching signals a maturation in how frontier labs are positioning LLMs within enterprise security workflows. A 25-firm partner ecosystem and government backing suggest this is becoming infrastructure-grade tooling rather than experimental capability, raising questions about whether specialized security models will fragment the LLM market or become standard defensive layers.73



























