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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
One change · api

Or, for the model with the same capabilities and no access approval requirement: changedmodels/fable-5/migration-guide

Nearest release: v2.1.296, published 15 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Recorded here
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First seen 25 Aug 2026 this site's first read of the page
Recorded edits14to this page, all time

## Migrating to Claude Mythos 5 and Claude Fable 5 from Claude Mythos Preview ### Update your model name ### Features not available on Claude Mythos 5 and Claude Fable 5 ### Token counting and billing ### Migration checklist ## Migrating to Claude Mythos 5 and Claude Fable 5 from Claude Opus 5 ### Update your model name ### What changed ### Migration checklist ## Migrating to Claude Mythos 5 and Claude Fable 5 from Claude Opus 4.8 ### Update your model name ### What changed ### Migration checklist

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The page is gone upstream. What it last said is kept here.

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