Anthropic’s Mythos breach was humiliating

Published: (April 23, 2026 at 02:24 PM EDT)
1 min read
Source: The Verge

Source: The Verge

Details

Anthropic’s tightly controlled rollout of Claude Mythos has taken an awkward turn. After weeks of insisting the AI model is so capable at cybersecurity that it is too dangerous to release publicly, the model appears to have fallen into the wrong hands anyway.

According to Bloomberg, a “small group of unauthorized users” has had access to Mythos—whose existence was first revealed in a leak—since the day Anthropic announced plans to offer it to a select group of companies for testing. Anthropic says it is investigating. This development is a stark contrast for a company that has built its brand on taking AI safety seriously while touting its cybersecurity capabilities.

Read the full story at The Verge

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