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Anthropic Rolls Out Mythos 5.2 With Improved Bug Hunting, Fewer Sandbox Escapes

Anthropicon Monday released Claude Mythos 5.2, the latest version of its access-restricted AI model, and Mozilla says it roughly doubled the vulnerability discovery results of Mythos 5.1 in Firefox.

Mythos 5.2 and Claude Fable 5.2, which was released alongside it, share the same underlying model. The difference lies in the guardrails: Fable, which anyone can use, carries protections against cybersecurity and biology misuse, while Mythos ships without some of them.

Direct access to Mythos is reserved for vetted organizations, which can apply through Anthropic’s Cyber and Life Sciences Verification Programs.

“We’ve worked closely with the Anthropic team all year to harden Firefox with successive generations of Claude models, and each round has left fewer, subtler bugs to find. Even so, Mythos 5.2 roughly doubled the vulnerability discovery metrics of Mythos 5.1 across respective scanning campaigns,” said Brian Grinstead, distinguished engineer at Mozilla.

Internally, Anthropic measures progresswith CVE Rediscovery,...

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Can you still trust Proton?

ZDNET’s key takeaways * Comments by Proton’s CEO caused a backlash in its privacy-focused community. * The company says managing security without AI is like bringing a knife to a gunfight. * The controversy has created a crisis of trust for a company whose business depends on it. It hasn’t

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Sources: Microsoft is among a group of companies lobbying the Trump administration to halt the FCC's plan to ban imports of Chinese optical transceivers

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Can you still trust Proton?

Sources: Microsoft is among a group of companies lobbying the Trump administration to halt the FCC's plan to ban imports of Chinese optical transceivers

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