Anthropic informed the US government, over 50 US companies, and on April 7 made a public announcement to the world about the potential dangers of Mythos.
82% confidence
DefenceNorth America
Omissions
The entities granted access were not exclusively 'US companies' — sources describe them as 'over 50 tech organizations' (NBC News), 'roughly 50 large companies and organizations managing critical digital infrastructure' (WSJ), and 'over 50 tech organizations' in the context of Project Glasswing, which may include non-US entities and non-corporate organizations.
The claim's temporal sequence in the original German ('und am 7. April dann endlich die Welt') implies the companies were informed before the April 7 public announcement. Available sources suggest the 50+ organizations were granted access as part of the April 7 Project Glasswing launch, not necessarily briefed in advance — only the US government is explicitly described as having been briefed beforehand.
All sources found are secondary (journalistic). A primary source — Anthropic's own system card or official blog post — was identified (red.anthropic.com and anthropic.com) but its full content was not directly consulted.
Sources
SecondaryCNBC"Prior to any external release, Anthropic briefed senior officials across the U.S. government on Mythos Preview's full capabilities, including its ability to find and exploit real-world software vulnerabilities autonomously."
SecondaryThe New York TimesArticle published April 7, 2026, covering Anthropic's public announcement about Mythos: 'Anthropic Claims Its New A.I. Model, Mythos, Is a Cybersecurity Reckoning.' Logan Graham, head of Anthropic's testing team, is quoted on the model's dangerous capabilities.
SecondaryNBC News"As part of the new effort, called Project Glasswing, Anthropic will give over 50 tech organizations access to Mythos Preview with over $100 million in compute credits."
SecondaryWorld Economic Forum"On 7 April, Anthropic announced Claude Mythos Preview, a frontier AI model so powerful (or risky) that the company decided not to release it publicly."
SecondaryThe Wall Street Journal"Anthropic has allowed roughly 50 large companies and organizations managing critical digital infrastructure to access Mythos."
SecondaryPlatformer"Anthropic told me that before launching Project Glasswing, it briefed senior US government officials about Mythos' capabilities, both offensive and defensive."