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Last updated: June 12, 2026, 11:35 PM ET

AI & Technology

Anthropic disabled access to Claude Fable 5 and Claude Mythos 5 models across all customer accounts late Tuesday, complying with a new U.S. export control directive that restricts advanced AI model distribution. The move follows heightened scrutiny of AI capabilities and potential dual-use applications.

The sudden removal affects enterprise users who previously had access to these specialized variants, though Anthropic declined to specify which government agency issued the restriction or whether other AI developers face similar constraints. Shares of major cloud computing partners were unchanged in after-hours trading.