TechCrunch
6/19/2026

The US banned Anthropic’s Fable 5 release, but the numbers don’t seem to care
Short summary
The US government forced Anthropic to withdraw its Fable 5 and Mythos 5 models following national security concerns related to a reported jailbreak vulnerability discovered by Amazon researchers. Cybersecurity researchers argue the ban is counterproductive, noting that similar jailbreaks exist in other leading models. The reported market data suggests this regulatory action has had minimal impact on Anthropic's adoption trajectory.
- •US government banned Fable 5 and Mythos 5 citing national security and jailbreak concerns
- •Security researchers say the move is ineffective—similar jailbreaks exist in competing models
- •Market adoption data reportedly shows minimal real-world impact on Anthropic
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