# Anthropic Called Mythos Too Dangerous to Release. Then Someone Guess-Logged In.

- slug: anthropic-called-mythos-too-dangerous-to-release-then-someone-guess-logged-in
- date: 2026-04-23
- category: Artificial Intelligence

The breach that exposed Anthropic’s most dangerous AI model wasn’t a sophisticated hack. It was a credential from a staffing firm breach and an educated URL guess — and sixteen days later, Anthropic still won’t say what else was accessed.

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