Leaked Anthropic Model Presents ‘Unprecedented Cybersecurity Risks,’ Much to Pentagon’s Pleasure
Leaked documents reveal a secret AI model so powerful Anthropic fears it's too dangerous to release publicly.
Anthropic left sensitive information accessible on its website, revealing the existence of Claude Mythos, a secret AI model the company calls 'by far the most powerful we've ever developed' and a 'step change' beyond the current Claude Opus 4.6. In a leaked, unpublished blog post, Anthropic stated the model is 'currently far ahead of any other AI model in cyber capabilities' and presents 'unprecedented cybersecurity risks,' leading the company to withhold its public release. The company confirmed the model's existence to Fortune but has not disclosed a timeline for deployment, citing both safety concerns and the model's reportedly extreme operational costs.
The leak has reignited a public feud with the Pentagon, particularly with Under Secretary of War Emil Michael, who has used the revelation to question Anthropic's trustworthiness. This conflict stems from Anthropic's refusal to allow its models to be used for domestic surveillance or fully autonomous weapons. Critics note the Pentagon's sudden concern over AI security risks appears contradictory, given its persistent push for broader military access to Anthropic's technology. The timing is also notable, as the leak coincides with reports that Anthropic is considering a public offering later this year, potentially positioning the powerful, secret model as a key asset for investors.
- Anthropic's leaked Claude Mythos model is described as a major leap in capability, surpassing their public Claude Opus 4.6.
- The company is withholding the model due to its 'unprecedented cybersecurity risks' and extremely high operational costs.
- The leak fuels an ongoing dispute with the Pentagon, which seeks broader military use of Anthropic's AI despite previously labeling the company a security risk.
Why It Matters
The incident highlights the growing tension between AI safety, commercial interests, and government demands for advanced, dual-use technology.