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Anthropic's Most Powerful AI Model Yet, Claude Mythos, Exposed in Data Leak With Warnings of Unprecedented Cyber Capabilities

Anthropic's Most Powerful AI Model Yet, Claude Mythos, Exposed in Data Leak With Warnings of Unprecedented Cyber Capabilities

Mar 30, 2026
Fortune

Anthropic's most powerful AI model yet, Claude Mythos, has been exposed in a data leak, revealing it dramatically outperforms previous models in coding and cybersecurity — but comes with alarming warnings that it is 'far ahead of any other AI model in cyber capabilities' and could enable large-scale AI-driven cyberattacks.

Anthropic's Internal Leak Exposes 'Claude Mythos,' A Powerful New AI Model Surpassing Opus 4.6, As OpenAI Quietly Preps 'Spud' Ahead Of Rival IPOs

Anthropic's Internal Leak Exposes 'Claude Mythos,' A Powerful New AI Model Surpassing Opus 4.6, As OpenAI Quietly Preps 'Spud' Ahead Of Rival IPOs

Mar 28, 2026
The Decoder

Anthropic's accidental leak of nearly 3,000 internal files reveals 'Claude Mythos,' a powerful new AI model surpassing Opus 4.6 in coding, reasoning, and cybersecurity, while OpenAI quietly prepares a rival model codenamed 'Spud' — with both companies racing to launch flagship models ahead of their anticipated IPOs.

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