The White House Is Gating Who Gets to Test Frontier AI — and the UK Just Found Out

The Office of the National Cyber Director has issued a directive to OpenAI and Anthropic: withhold your newest AI models from the United Kingdom’s AI Safety Institute until a US-led security review is complete. Anthropic complied, leaving its latest model, Claude Mythos 5.1, restricted to a specific set of US organizations. OpenAI has not responded […]