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Claude Fable 5 government ban controversy

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The US government forced Anthropic to pull Claude Fable 5 and Mythos 5 three days after release, citing national security concerns following Amazon researchers' discovery of a jailbreak that bypassed Fable 5's guardrails. Anthropic and cybersecurity researchers disputed the ban, noting similar vulnerabilities exist in competing models.

  • US government ban issued June 19, 2026, just three days after Fable 5 release
  • Amazon researchers found jailbreak bypassing Fable 5's safety guardrails, triggering national security review
  • Anthropic stated identical jailbreaks exist in other AI models, questioning selective enforcement
  • Cybersecurity researchers signed open letter opposing the ban as dangerous precedent
  • Anthropic researcher Amanda Askell working on agentic AI safety and human value alignment