The company cited a US export-control order which came days after it revealed previously hidden Fable 5 safeguards US AI company Anthropic said on Friday that it disabled access to its most advanced AI models, Fable 5 and Mythos 5, after receiving a government order to suspend access by foreign nationals. The company said it shut down the models for all users while it assesses how to comply with the export-control order. The order also applied to foreign-national Anthropic employees, it added.