Anthropic and OpenAI Race to Deploy Powerful Cybersecurity AI While Restricting Access Amid National Security Concerns

Anthropic launches Claude Security in public beta while facing White House pushback over expanding its more powerful Mythos model, as both Anthropic and OpenAI race to deploy cutting-edge cybersecurity AI tools while restricting access to their most capable models amid growing national security concerns.

• Anthropic launches Claude Security in public beta for Enterprise users, a dedicated cybersecurity tool powered by Opus 4.7 that scans codebases for vulnerabilities by reasoning through code like a security researcher, with integrations planned for CrowdStrike, Microsoft Security, Palo Alto Networks, and others.
• The White House is pushing back against Anthropic's plans to expand access to its more powerful Claude Mythos model to 70 additional organizations over national security concerns, while the AI Security Institute reports that OpenAI's GPT-5.5 now matches Mythos Preview in cybersecurity capabilities.
• Both Anthropic and OpenAI are restricting their most powerful cybersecurity models to limited audiences — Anthropic with Mythos and OpenAI with GPT-5.5-Cyber — as both companies race to address security threats that their own increasingly capable AI models are simultaneously making worse.