OpenAIAnthropicGooglexAIPerplexity
← Back to all updatesPublished ·Anthropic◆ Critical
Anthropic removed Claude Fable 5 and Mythos 5 modelcard content.
The read
Builders should verify model IDs, access paths, and provider availability before routing traffic.
The frame
The removed text named claude-fable-5, claude-mythos-5, Project Glasswing, and June 9, 2026 availability.
Primary source
Anthropic modelcard →Keep reading
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