TestingCatalog

Anthropic is preparing a commercially versioned release of its most capable frontier model, reported as Mythos 1 with the model identifier claude-mythos-1-preview, after traces of the string appeared …

Anthropic stated Claude Mythos would remain restricted to roughly 40 organizations under Project Glasswing, but users briefly saw a "Mythos 1" preview model appear in the Claude Code interface the nex…