This market resolves YES if Anthropic makes a model called Claude Mythos, Mythos, or a clear successor with `Mythos` in the official name broadly available before 2026-07-01 00:00 UTC. Broadly available means at least one of: listed in Anthropic's public model docs for ordinary API use; available in the standard Claude.ai model picker to Pro/Max/Team/Enterprise users generally; or announced by Anthropic as publicly available beyond a narrow invite-only, research-preview, Glasswing-partner, or safety-evaluation cohort. The April 2026 Mythos Preview / Project Glasswing announcement by itself is NOT enough for YES unless Anthropic later broadens access as described above. Limited private pilots, partner-only access, red-team access, or safety research access resolve NO unless they become broad access before the deadline. Sources / resolver surfaces: - Anthropic news: https://www.anthropic.com/news - Claude Mythos Preview technical page: https://red.anthropic.com/2026/mythos-preview/ - Anthropic model docs: https://docs.anthropic.com/en/docs/about-claude/models/overview