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Published Jun 19, 2026·Anthropic◆ Critical

Anthropic modelcard now lists Claude Fable 5 and invitation-only Claude Mythos 5.

The read

Model routing tables need new Anthropic IDs and access gating separated for Fable 5 and Mythos 5.

The frame

Fable 5 uses claude-fable-5. Mythos 5 uses claude-mythos-5 and sits inside Project Glasswing.

Primary source

Anthropic modelcard →

Keep reading

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Related updates

Jul 10, 2026OpenAI is deprecating Atlas as browser-based agentic capabilities move into ChatGPT and Codex.
Jul 10, 2026Google removed Gemini Developer API pricing content from the monitored pricing page.
Jul 09, 2026OpenAI model card page removed its captured API docs navigation content

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