The Cybersecurity and Infrastructure Security Agency (CISA) gained access to the limited release cybersecurity-focused model last week, Nextgov/FCW reports. It’s just a little late, since the rest of the world has mostly moved onto the drama around the Trump administration’s block of the safeguarded public version of the model, Fable. [Link: CISA now has full Mythos Preview access, people familiar say | https://www.nextgov.com/cybersecurity/2026/06/cisa-now-has-full-mythos-preview-access-people-familiar-say/414260/ | Nextgov.com]

The cyberdefense agency received access around a week ago, but the White House has not yet set clear parameters for how the agency should use the model.

The Cybersecurity and Infrastructure Security Agency (CISA) gained access to the limited release cybersecurity-focused model last week, Nextgov/FCW reports. It’s just a little…

The Cybersecurity and Infrastructure Security Agency (CISA) now has full access to Anthropic's Mythos Preview model, according to sources familiar with the development.