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Published ·Anthropic◆ Critical

Anthropic removed Models overview content describing Claude Fable 5 and Mythos 5.

The read

Model selection and availability references for Fable 5 and Mythos 5 are no longer visible in the tracked page body.

The frame

The removed copy stated Fable 5 was generally available June 9, 2026, and Mythos 5 was limited availability.

Primary source
Anthropic modelcard
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