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Dario Amodei

Anthropic CEO Dario Amodei standing before the White House, representing the company's cybersecurity collaboration with the U.S. government through Project Glasswing

U.S. Government Used Anthropic’s Mythos To Find Classified System Vulnerabilities Within Hours

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The government participates in Project Glasswing, which gives vetted partners access to Mythos, the Anthropic model that has found more than 10,000 software vulnerabilities since April.

 

The U.S. government used Anthropic’s Mythos AI models to identify vulnerabilities in classified systems within hours, according to the Associated Press. It is the most sensitive disclosed application yet of Project Glasswing, Anthropic’s restricted program that gives vetted organizations access to its most powerful AI models to find software vulnerabilities before attackers do.

It is unclear whether the government used Mythos Preview, the original version launched in April, or Mythos 5, the latest version. The U.S. government suspended access to Mythos 5 on June 12 after citing a jailbreak identified in Fable 5, the consumer version of the same model, and halted access to both on security grounds.

Anthropic launched Project Glasswing, concurrently with Mythos, after determining that Mythos was too effective at finding vulnerabilities to release publicly. The company restricted access to a short list of vetted technology and cybersecurity companies, along with select government organizations. Partners found more than 10,000 high- and critical-severity software vulnerabilities in the program’s first weeks.

The government and Anthropic continue to work together despite the ongoing conflict between the parties. In March, the Department of Defense designated Anthropic a supply chain risk after Anthropic requested assurances its models would not be used for mass domestic surveillance or fully autonomous weapons. Anthropic challenged the designation in federal court and secured a temporary injunction. In June, the government separately ordered Anthropic to suspend access to Fable 5 and Mythos 5 due to concerns about access by foreign nationals. Anthropic complied while publicly disputing the evidence behind the order. The lawsuit remains active.

The White House held direct talks with Anthropic CEO Dario Amodei earlier this year about cybersecurity and shared AI priorities. Anthropic said it plans to expand Glasswing’s membership.

Red dots, black grids and abstract pattern blocks illustrate Anthropic AI policy proposal.

Anthropic Urges Congress To Require testing Of frontier AI Models

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The AI company released a broader policy proposal as lawmakers debate how the United States should govern increasingly capable AI systems.

 

Anthropic is urging Congress to require independent safety testing for the most capable AI models, arguing that existing policy discussions do not go far enough to address the risks posed by rapidly advancing AI.

The recommendation was included in a broader policy proposal released Tuesday, alongside Anthropic’s essay, The Policy on the AI Exponential. The company said the United States should strengthen oversight of frontier AI systems as model capabilities continue to improve and are more widely deployed.

According to Reuters, Anthropic also urged lawmakers not to preempt state AI laws unless a robust federal system is in place and called for independent evaluations of the most advanced models before deployment.

The proposal arrives as Congress continues to debate federal AI legislation and as policymakers weigh how much responsibility should fall on companies developing the technology.

In its essay, Anthropic argued that AI progress is accelerating and could have major consequences for national security, economic growth, and the labor market. The company said governments should prepare for a future where advanced AI systems play a much larger role in society and the economy.

“We may be entering a period of very rapid change,” Anthropic CEO Dario Amodei wrote in the essay, describing the possibility that AI systems could become significantly more capable over the next several years.

Anthropic’s proposal outlines several areas where the company believes policymakers should focus, including AI safety testing, national security safeguards, export controls, infrastructure development, and the government’s capacity to evaluate advanced models.

The company also called for greater transparency around frontier AI development. It argued that policymakers should have access to independent assessments of the most capable systems before they are widely deployed.

The recommendations come as lawmakers, regulators, and technology companies continue to debate whether existing laws are sufficient to address the risks associated with advanced AI models. Several AI developers, including Anthropic, OpenAI, and Google, have publicly supported some form of government oversight for the most powerful systems, although they differ on specific regulatory approaches.

Anthropic’s proposal was released less than a week after House lawmakers unveiled a discussion draft intended to guide future federal AI legislation. The company did not endorse that proposal and instead offered its own recommendations for how Congress should approach AI governance as model capabilities continue to advance.