Glasswing Organizations — What's Actually Known

What we can say with confidence

The strongest public facts about Glasswing participants are about type and scale, not identity. Roughly 50 organizations took part in the Mythos Preview, and the program is concentrated in cyberdefense and critical-infrastructure work, with US-government involvement indicated.

What we can't responsibly claim

Anthropic has not released a roster of participating organizations. Because of that, any list of specific named companies — however confident it sounds — should be treated as unconfirmed rumor. We deliberately avoid naming individual organizations here, since doing so would mean inventing detail the public record doesn't support.

Why the focus on cyberdefense and critical infrastructure

The participant profile fits the program's purpose: giving a small, vetted group access to the unrestricted Mythos editions for defensive and high-stakes work, while the public uses the safeguarded Fable 5. That mission naturally points toward security and infrastructure organizations rather than general commercial users. For the program overview, see Project Glasswing explained.

How to read claims you find elsewhere

If you encounter a confident "list of Glasswing companies," check it against the sources below. The publicly supported statements are the ~50-org scale, the sector focus, and US-government involvement — anything more granular is speculation. See also Glasswing countries for the geographic picture.