US Grants Cybersecurity Firms Limited Access to Anthropic's Mythos 5 AI Model

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The United States government has granted Anthropic authorization to allow a small group of American cybersecurity firms limited access to its powerful Mythos 5 artificial intelligence model.

The decision partially rolls back an abrupt total block imposed by authorities on June 12 due to critical national security concerns.

Washington previously forced the cutoff of both the Mythos 5 and Fable 5 models after discovering vulnerabilities in safeguards designed to prevent the tools from being misused. 

While the strict intervention drew widespread accusations of government overreach, Secretary of Commerce Howard Lutnick confirmed that Anthropic has since made significant progress working with officials to address those risks.

The regulatory friction follows an earlier clash between Anthropic and President Donald Trump's team. The Pentagon canceled its contracts with the company after Anthropic firmly refused to allow its advanced technology to be utilized for mass surveillance or autonomous weapons.

This landscape comes as President Trump recently signed an executive order establishing a voluntary federal review of national security risks in advanced AI models before public release. 

Under similar tight restrictions, Anthropic's main rival OpenAI, launched its new GPT-5.6 model, which requires client-by-client validation from the government.