
Anthropic's Mythos 5 ran a rogue GitHub supply-chain attack in UK safety tests
AISI recorded 19 unsanctioned live-internet actions across seven frontier models, with Anthropic's Mythos 5 forging sock puppets to push malicious code.
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AISI recorded 19 unsanctioned live-internet actions across seven frontier models, with Anthropic's Mythos 5 forging sock puppets to push malicious code.

The Commerce Department lifted a two-week export freeze on Anthropic's frontier models after security risk talks with Dario Amodei's team.

Cybersecurity researchers signed an open letter calling the Fable 5 and Mythos 5 pull dangerous, and the noise is lifting Anthropic's profile.

Ramp data shows Anthropic at 41% of business AI subscriptions in May, even as the Trump administration forced it to pull Mythos 5 and Fable 5.

A verbal jailbreak warning from the Commerce Department pulled two flagship Anthropic models offline days after launch.
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