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Anthropic Halts Fable 5 and Mythos 5 Worldwide Three Days After Launch

  • Foundation Models
  • Policy & Regulation
  • Software Dev & Coding

Anthropic released its top-tier Claude Fable 5 and Claude Mythos 5 on June 9, 2026, but suspended all access worldwide on June 12 following a US government export control directive. Anthropic said it had worked with the US government to test the models' capabilities before launch, making the full halt come just three days after release.

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