Leaked Anthropic Model Presents 'Unprecedented Cybersecurity Risks,' Much to Pentagon's Pleasure

There are two groups that seem absolutely thrilled by the recent revelation that Anthropic is working on a top-secret AI model: the Department of Defense and Anthropic’s fundraising team. On Thursday, Fortune reported that Anthropic left a slew of not-yet-public information accessible on its website, leading to the reveal of a supposedly super-powerful, yet-to-be-released model called Claude Mythos. The model—which is supposedly “by far the most powerful AI model we’ve ever developed,” per the text of a leaked, unpublished blog post from Anthropic—blows away benchmarks set by the company’s current public model, Claude Opus 4.6. The company confirmed the model’s existence to Fortune and called it “a step change and the most capable model we’ve built to date.” The company also basically said it’s holding back the model because it might actually be too dangerous to release to the public at this point. Per Fortune, Anthropic said the model is “currently far ahead of any other AI model in cyber capabilities,” and presents unprecedented cybersecurity risks that the company seems to want to get out in front of. That revelation has the Pentagon doing victory laps, even though it never gave