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Claude Fable 5 government ban controversy
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The US government banned Anthropic's Claude Fable 5 and Mythos 5 models on June 19, 2026, citing national security concerns after Amazon researchers discovered a jailbreak bypassing Fable 5's guardrails. Anthropic and cybersecurity experts disputed the move, noting similar vulnerabilities exist in competing models.
- US government forced Anthropic to pull Fable 5 and Mythos 5 on June 19, 2026 over national security concerns
- Amazon researchers found a jailbreak method that bypassed Fable 5's guardrails, triggering the ban
- Cybersecurity researchers signed an open letter opposing the ban as dangerous
- Anthropic stated identical jailbreaks exist in other AI models, questioning the ban's rationale
- The ban occurred only three days after Fable 5's initial release