Amazon Research Sparked Anthropic Fable 5 Export Ban
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- The Wall Street Journal reported that Amazon cybersecurity research and conversations between CEO Andy Jassy and the White House triggered the export control directive that led to Anthropic cutting off access to Fable 5 and Mythos 5.
- Amazon's paper claimed that a series of prompts could get Fable 5 to serve up information useful for cyberattacks; the directive shortly afterward barred use by foreign nationals — locking out many of Anthropic's own foreign-born researchers from their own product.
- Anthropic disputed the government's "jailbreak" characterization, arguing the same vulnerabilities could be discovered using other publicly available models including GPT 5.5.
- Luta Security founder and CEO Katie Moussouris said on BlueSky that "I've seen the paper. It's not a jailbreak," backing Anthropic's interpretation.
- Former Commerce Department official Kate Koren speculated to the WSJ that the White House's dislike of Anthropic may have influenced the decision.
- Anthropic and the Trump administration have a history of friction: in February, Trump instructed federal agencies to stop using Anthropic's AI, and Secretary of Defense Pete Hegseth designated the company a supply chain risk — though the two had since reconciled to expand access to Mythos.
Why it matters: The directive didn't just restrict foreign customers — it barred many of Anthropic's own foreign-born researchers from accessing Fable 5 and Mythos 5, a workforce self-infliction. Combined with Anthropic's rebuttal that the same vulnerabilities exist in GPT 5.5 and an independent security expert calling the "jailbreak" label wrong, the move raises questions about whether national security or a specific grudge against Anthropic drove the call.
