US government warned Anthropic that Fable 5 had been jailbroken, but firm 'refused' to fix before US implemented export controls — Anthropic defended its decision by saying the jailbreak 'isn’t serious,' Chinese group had reportedly accessed model
Summary
David Sacks said the US government warned Anthropic that Claude Fable 5 had been jailbroken and that CEO Dario Amodei refused to fix the flaw.
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MISANTHROPIC: David Sacks notes the irony: Anthropic once opposed government surveillance, yet now retains every prompt and output sent to its latest Mythos-class models for 30 days. pic.twitter.com/801YyowTG8
— @amuse (@amuse) June 13, 2026
GLM 5.2 just took the #1 spot on the BridgeBench Reasoning benchmark.
— Bridgebench (@bridgebench) June 14, 2026
It beat Claude Fable 5.
A Chinese open source model is now ranked above the best closed model in the world on grounded multi-step reasoning.
I tested GLM 5.2 yesterday and called out real attention to detail… pic.twitter.com/C8cBiv7Yq7
Two days ago the US banned Claude Fable 5.
— BridgeMind (@bridgemindai) June 14, 2026
Yesterday China dropped GLM 5.2.
Today GLM 5.2 is #1 on @bridgebench BS at 100.0, and #1 on Reasoning at 42.8, beating Fable 5.
At 1/10th the cost and 300 tokens per second.
You cannot export control your way out of an open source… pic.twitter.com/n7Ag9vYV9z