Anthropic is developing a new AI model, “Claude Mythos,” described as its most
capable yet and now in early-access testing. Its existence was revealed via a
data leak from a publicly accessible cache containing draft materials, including
claims of unprecedented cybersecurity risks. The cache also exposed plans for an
invite-only CEO summit. After being alerted, Anthropic restricted access,
attributing the leak to a configuration error and calling the materials early
drafts.
