Based on reporting from The Information and The Wall Street Journal, Andy Jassy of Amazon alerted the Trump administration to a Fable jailbreak, triggering the emergency ban.
Snapshot · Hard Fork
Based on reporting from The Information and The Wall Street Journal, Andy Jassy of Amazon alerted the Trump administration to a Fable jailbreak, triggering the emergency ban.
Where this was said
At 5:05 · chapter starts 4:06
Kevin Roose walks through the events of June 12th: the Commerce Department's export-control directive blocked all foreign nationals — including Anthropic employees — from accessing Fable 5 and Mythos 5, forcing Anthropic to pull the models entirely because it had no way to verify user citizenship at scale. The stated reason was a 'trusted partner' tip about a jailbreak, believed based on reporting from The Information and The Wall Street Journal to have come from Amazon CEO Andy Jassy. Casey points out that when other cybersecurity researchers reviewed the alleged jailbreak, it looked like standard defensive security work — the kind of interaction a defender needs to identify and patch vulnerabilities. [1] — Kevin Roose "One cybersecurity expert who reviewed Amazon's research concluded the flagged behavior wasn't actually alarming — it was the kind of intera…" 05:55 Anthropic's Project Glasswing, which had been sharing Mythos with vetted partners to harden US critical infrastructure, was shut down in the process.
The US Commerce Department banned Anthropic's Claude Fable 5 and Mythos 5 on June 12th via export-control directive, shutting access globally for approximately two weeks before lifting restrictions.
The Trump administration's Commerce Department banned Anthropic's Fable 5 and Mythos 5 models worldwide after Amazon CEO Andy Jassy flagged a jailbreak vulnerability. The ban, which Anthropic had no way to comply with granularly, forced the company to pull the models entirely — halting Project Glasswing, Anthropic's initiative to harden US critical infrastructure cybersecurity.
One cybersecurity expert who reviewed Amazon's research concluded the flagged behavior wasn't actually alarming — it was the kind of interaction a defender uses to find and fix bugs. Ironically, that dual-use nature was the whole point of Anthropic's Project Glasswing, which shared Mythos with partners specifically to harden critical US infrastructure before similar capabilities appeared in rival models.
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