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Anthropic modelcard removed Claude Fable 5 and Mythos 5 model guidance and availability details.
The read
Treat prior Fable and Mythos routing assumptions as stale until the modelcard publishes replacement guidance.
The frame
The removed text named Fable 5 as most capable widely released and placed Mythos 5 in limited availability.
Primary source
Anthropic modelcard →Keep reading
See what Nova3 builds →Related updates
- Aug 19, 2026Anthropic renamed Workbench to Playground in the Claude Console.
- Aug 19, 2026Anthropic made Claude Enterprise Admin API user-management endpoints generally available for members, invites, groups, and custom roles.
- Aug 19, 2026Anthropic pricing page removed its five-question Claude plan recommender flow.
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