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Anthropic’s Mythos Model Is Being Accessed by Unauthorized Users

Posted

April 22, 2026

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A small group of unauthorized users have accessed Anthropic PBC's new Mythos AI model, which the company says can enable dangerous cyberattacks. #ai #anthropic #business #worldnews #usa #tech

The users gained access to Mythos through a mix of tactics, including using access one of them had as a worker at a third-party contractor for Anthropic and using internet sleuthing tools.

Anthropic is investigating the report of unauthorized access, and the company says it currently has no evidence that the access is impacting any of its systems.

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Anthropic’s Mythos Model Is Being Accessed by Unauthorized Users · Bloomberg News · Sentinel