Anthropic Blocks Foreign Nationals from Using Its Mythos and Fable A.I.

Zcash founder Zooko Wilcox said Anthropic's Mythos AI model found no further "serious bugs" in the privacy protocol following the patching of a previously discovered forgery bug.

The U.S. government killed Anthropic’s most capable artificial intelligence (AI) models on June 12, 2026, and crypto markets betting on the company’s so-called private valuation immediately felt it. A Two-Stage Collapse in Four Days Anthropic released Claude Fable 5 on June 9, 2026, billing it as the most capable publicly available model in the company’s […]

AI giant Anthropic said in a statement released Friday that it had disabled its most advanced AI models, known as Fable 5 and Mythos 5, after the US government ordered it to suspend access to the models for foreign nationals, citing unspecified national security concerns.

Anthropic says it disabled Fable 5 and Mythos 5 after a US government export-control directive, while pre-IPO-linked trading weakened.

On Friday evening, the government ordered Anthropic to block access to Fable 5 and Mythos 5 for all foreign nations, both inside and outside the US, due to national security concerns. That order included employees of Anthropic. To meet those demands, the company has completely cut off access to the models for all customers. In a statement, Anthropic said that while it was complying with the order, the government "did not provide specific details of its national security concern." Instead, it claims that any evidence of potential jailbreak was provided verbally, and that the vulnerabilities discovered were minor and available via other model … Read the full story at The Verge.

Company said US government believes safeguards can be bypassed and product used to identify software vulnerabilities Anthropic said it will “abruptly disable” its most advanced AI models for all users after the US government ordered it to suspend access to the models for foreign nationals, citing national security concerns. The company received the export control directive to suspend access to Fable 5 and Mythos 5 for all foreign nationals, without being given specific details of the national security concern, Anthropic said in a statement. Continue reading...

Anthropic said it abruptly disabled its two most capable artificial intelligence (AI) models, Fable 5 and Mythos 5, for all customers worldwide after the U.S. government ordered it to cut off access for any foreign national, citing national security. An Order Of Potential Major Repercussions The directive arrived on June 12 at 5:21 p.m. Eastern […]

Zcash has undergone a follow-up security audit using Anthropic’s Mythos system, which, according to founder Zooko Wilcox, found no additional serious vulnerabilities in the protocol after the recent Orchard flaw disclosure. According to Wilcox, Anthropic carried out the audit at…