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Published Jul 14, 2026·Anthropic◆ Critical

Anthropic removed modelcard copy for Claude Fable 5 and Claude Mythos 5.

The read

Builders lose a page reference for Fable 5 selection, Mythos access, and provider availability.

The frame

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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Related updates

Jul 14, 2026OpenAI retired GPT-5.2 models in ChatGPT; existing conversations continue on corresponding GPT-5.5 models.
Jul 14, 2026Dreams research preview now supports Claude Fable 5 and Claude Sonnet 5.
Jul 14, 2026OpenAI removed ChatGPT Business and Enterprise pricing copy from the pricing page

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