US asks Anthropic to block global access to top AI models: Why it matters

The administration of US President Donald Trump has barred foreigners from accessing the top AI models developed by Anthropic, citing national security concerns, underscoring the US government's policy of export controls over advanced technology. The United States' measures come less than a week after Anthropic, the company behind the Claude chatbot, rolled out a new artificial intelligence (AI) model named Claude Fable 5 and Mythos 5. The latest move has reignited the feud between Anthropic and the Trump administration. The San Francisco-based company is suing the administration after it was put on a supply chain blacklist for its refusal to allow the US military to use its AI models for domestic surveillance and fully autonomous weapons systems. Anthropic said the US government gave the company an order citing national security concerns, but did not specify further details.