Observed 11 November 2026
Two new models, claude-fable-5-2 and claude-mythos-5-2, were added to Anthropic's deprecations table as Active, with no retirement date set and no earlier than November 9, 2027.
routinesummary written by a model — check it against the diff below
No binding language changed. Likely wording, structure or navigation.
+2 · 12df7cd → 88f0f1b · 88f0f1bb24ee · live page
anthropic/model-deprecations.txt11 Nov 2026
37 unchanged lines Model status Current and recently retired models are listed in the following table with their status: API model name Current state Deprecated Tentative retirement date claude-fable-5-2 Active N/A Not sooner than November 9, 2027 claude-mythos-5-2 Active N/A Not sooner than November 9, 2027 claude-fable-5-1 Active N/A Not sooner than September 1, 2027 claude-mythos-5-1 Active N/A Not sooner than September 1, 2027 claude-fable-5 Active N/A Not sooner than June 9, 2027 87 unchanged lines
Underlined words mark what moved within a rewritten line. Nothing here is interpreted — this is the difference between two captures, and the conclusion is yours.