Amazon Report Triggered Fable 5 Takedown
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- Amazon called administration officials Thursday night with a report showing it had jailbroken Anthropic's Mythos model, triggering a scramble that led to Fable 5 being shut down by Friday night—just days after its public release.
- Anthropic had previously notified the government multiple times about the planned June 9 release of Fable (a general-use version of Mythos), and the government did not initially object.
- The White House told Anthropic at 1 p.m. ET Friday it had 90 minutes to take down Fable and Mythos due to a "national security threat," then sent a 5:30 p.m. letter imposing sweeping export controls; users lost access by 10 p.m.
- The new export controls extend beyond foreign adversaries to U.S. allies and any foreign national in the U.S., immediately complicating access for Anthropic's foreign-born workers who need model access.
- Anthropic pushed back in calls with the administration, arguing Amazon's jailbreak was relatively simple, replicable with other models, and did not reflect a flaw in Fable 5's safety systems.
- Luta Security CEO Katie Moussouris, whom Anthropic shared the Amazon report with, said the government's response was "way out of line with what's actually in the research report," noting the queries were the kind normal defenders would ask.
- A person familiar with the letter called it "a de-facto licensing regime," adding that an administration official does not view other models as crossing the national security bar that Mythos set.
Why it matters: Amazon, a major Anthropic investor, helped convince the White House to impose export controls that target a single company's most powerful models—a move one source called a de-facto licensing regime that will chill how the rest of the industry engages with Washington. Inside Anthropic, foreign-born engineers lost access to their own company's frontier models overnight, while CEO Dario Amodei now faces a government that views Anthropic as dismissive of national security concerns.
