OpenAI's GPT-5.5 Cyber AI Beats Anthropic's Banned Mythos Model—And Nobody's Shutting It Down

OpenAI's GPT-5.5-Cyber model has achieved the top rank on the CyberGym leaderboard, surpassing Anthropic's models. This development comes as Anthropic's top-performing models are currently offline due to an export ban imposed by the Trump administration. The CyberGym leaderboard tracks the performance of AI models in cybersecurity tasks, and GPT-5.5-Cyber's ascent signifies a significant advancement in this domain. The ban on Anthropic's models highlights the geopolitical considerations and regulatory hurdles impacting the development and deployment of advanced AI technologies. OpenAI's continued progress with GPT-5.5-Cyber suggests a robust development pipeline and a strategic focus on specialized AI applications like cybersecurity.