The US government blocks two high-performance Anthropic AI models for foreign nationals over concerns about a workaround to security restrictions — a step Anthropic criticizes as non-transparent and technically unjustified.
Anthropic increasingly differentiates AI access by user category: the public receives Fable 5 with active security routing, while governments, large enterprises and research labs can use the less restrictive Mythos 5.
Anthropic splits Claude Fable 5 into a public version (with safeguards) and a restrictive version (Claude Mythos 5 without security layers) for verified cybersecurity experts.
