What were Mythos and Fable, and why were they banned?

Mythos and Fable are Anthropic's most advanced AI models. The White House blocked foreign nationals from accessing them last month, citing security concerns. Mythos was reportedly capable of finding vulnerabilities in browsers and websites.

Why did the US government view Anthropic as a national-security risk?

Anthropic refused to allow the Pentagon to use its systems in fully autonomous weapons or domestic surveillance, which led the federal government to designate the company a national-security risk.

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US lifts export ban on Anthropic's advanced AI models

Semafor Tech3h ago3 min read

Key takeaway

The US White House has lifted its export ban on Anthropic's advanced AI models Mythos and Fable, which it had blocked from foreign use just last month on security grounds. The reversal highlights ongoing regulatory uncertainty as AI technology advances, particularly as the US government navigates tensions between controlling powerful AI systems and supporting responsible development by companies like Anthropic.

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3 Key Points

What happened
The White House lifted its export ban on Anthropic's most advanced AI models, Mythos and Fable, which it had blocked from foreign nationals last month citing security concerns. Anthropic had suspended access to both models in response to the ban.
Why it matters
The reversal underscores the regulatory uncertainty around AI development and deployment. Anthropic had previously refused to let the Pentagon use its systems in fully autonomous weapons or domestic surveillance, a stance that led the federal government to designate the company a national-security risk. This series of events shows how quickly policy positions can shift as the technology advances.
What to watch
Mythos was reportedly capable of finding vulnerabilities in browsers and websites and had been released only to select organizations to help them fix those vulnerabilities. The lifting of the ban means those organizations can once again access the model.

FAQ

What were Mythos and Fable, and why were they banned?: Mythos and Fable are Anthropic's most advanced AI models. The White House blocked foreign nationals from accessing them last month, citing security concerns. Mythos was reportedly capable of finding vulnerabilities in browsers and websites.
Why did the US government view Anthropic as a national-security risk?: Anthropic refused to allow the Pentagon to use its systems in fully autonomous weapons or domestic surveillance, which led the federal government to designate the company a national-security risk.

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