Anthropic Offers Mythos Upgrade for Cyber Partners and a ‘Safe’ Version for the Rest of You

Anthropic is releasing Claude Mythos 5 to trusted organizations and Claude Fable 5 to the public, a version it says can’t be used for cyberattacks...

Discord Sleuths Gained Unauthorized Access to Anthropic’s Mythos

Plus: Spy firms tap into a global telecom weakness to track targets, 500,000 UK health records go up for sale on Alibaba, Apple patches a revealing notification bug, and more...

PT-2026-34832

Critical vulnerability in Anthropic Mythos and reported NSA adoption CVE-2026-21841 https://t.co/ZwHNBc0RF8 machinelearning ai...

Mythos: An AI tool too powerful for public release

Anthropic’s most capable model to date, Claude Mythos Preview aka Mythos, has been described as a “step change” in AI performance, especially on cybersecurity tasks. Anthropic tried to keep Mythos a secret until a few weeks ago, when a data leak revealed the existence of what the company said was...

Anthropic’s Mythos Will Force a Cybersecurity Reckoning—Just Not the One You Think

The new AI model is being heralded—and feared—as a hacker’s superweapon. Experts say its arrival is a wake-up call for developers who have long made security an afterthought...