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Anthropic's pre-IPO shares fall as US government shuts down Fable, Mythos models

A jailbreak report prompted Washington to pull Fable 5 and Mythos 5 from all users. Anthropic complied but pushed back hard, saying the finding sets a standard that would halt the entire AI industry.

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Anthropic's pre-IPO shares fall as US government shuts down Fable, Mythos models

U.S. government shut Anthropic's Fable 5 and Mythos 5 over jailbreak risks; pre-IPO perp dropped 3.7% to $1,627. Anthropic disputes the directive, citing narrow, known vulnerabilities also found in GPT-5.5—signaling regulatory precedent risk for frontier AI deployments.

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Timeline cronologica

sabato 13 giugno 2026·forbes.com
Anthropic Pulls Fable, Mythos After Government Issues Emergency Export Control Order
The U.S. government ordered Anthropic to pull Fable 5 and Mythos 5 over national security concerns just days after its CEO called for exactly this kind of oversight.
sabato 13 giugno 2026·daringfireball.net
U.S. Government Directs Anthropic to Shut Down Fable 5 and Mythos 5 Models on National Security Grounds
Link to: https://www.anthropic.com/news/fable-mythos-access

Anthropic's pre-IPO shares fall as US government shuts down Fable, Mythos models

Confronto fonti

Anthropic's pre-IPO shares fall as US government shuts down Fable, Mythos models

Timeline cronologica

Anthropic Pulls Fable, Mythos After Government Issues Emergency Export Control Order

U.S. Government Directs Anthropic to Shut Down Fable 5 and Mythos 5 Models on National Security Grounds

US orders Anthropic to shut down Fable 5 and Mythos 5

Anthropic Pulls Fable, Mythos After Government Issues Emergency Export Control Order

US government forces Anthropic to disable Claude Fable 5 and Mythos 5 for all customers worldwide

Anthropic suspends all access to Mythos model after US government bans foreign nationals use | CNN Business

Anthropic disables Fable 5, Mythos 5 models after US order limiting foreign access

Anthropic disables top-tier AI models after US order limiting foreign access

Anthropic disables access to Fable 5 and Mythos 5 to comply with government directive

US orders Anthropic to halt foreign access to its most advanced AI models - The Economic Times

Anthropic suspends new AI models after government directive

Anthropic to disable Fable 5, Mythos 5 after US export-control order

Anthropic's safety warnings may have just backfired — the government has pulled the plug on its most powerful AI | TechCrunch

US orders Anthropic to halt foreign access to its most advanced AI models

Anthropic shuts down Fable, Mythos models following Trump admin directive

US orders shutdown of Anthropic’s Fable 5, Mythos 5 over security concerns - The Economic Times

Anthropic suspends access to Fable 5, Mythos 5, citing US directive

As US bans Fable 5 and Mythos 5, Anthropic shares a 700-plus word statement; says ‘we believe the government …’

US orders Anthropic to shut down Fable 5 and Mythos 5

U.S. Orders Anthropic to Suspend Fable 5 and Mythos 5 Access for Foreign Nationals

Anthropic cuts access to AI models over US 'national security' order - World News

Anthropic's pre-IPO shares fall as US government shuts down Fable, Mythos models

Anthropic pulls Fable 5 and Mythos 5 after US export control order

US government forces Anthropic to disable Claude Fable 5 and Mythos 5 for all customers worldwide

US government forces shutdown of Anthropic's AI Fable 5 and Mythos 5