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Claude Mythos Leaked: Anthropic's Secret Next-Gen AI Model Exposed by Misconfigured Data Store
Claude Mythos (codename "Capybara") is a leaked Anthropic AI model discovered on March 26, 2026 via a misconfigured public data store. Internal docs show dramatic benchmark gains over Opus 4.6 in coding, reasoning, and cybersecurity — with "unprecedented" safety risks.