claude-fable-5-2

A Claude Code model, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

Releases whose published page names claude-fable-5-2.

1. v2.1.321 9 Nov 2026
   Claude Code now recognises the Fable 5.2 and Mythos 5.2 models

   Claude Code now knows claude-fable-5-2 and claude-mythos-5-2, accepts the short names fable-5-2 and mythos-5-2, and lists Fable 5.2 as latest

   named in this entry, found in this entry's text

2. v2.1.321 9 Nov 2026
   Fast mode on Fable 5.2 and Mythos 5.2 now needs you to choose it

   Fast mode on claude-fable-5-2 and claude-mythos-5-2 only applies if you chose it this session or saved that choice in your config

   found in this entry's text

The earliest release whose published evidence quoted claude-fable-5-2 was v2.1.321, 9 Nov 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the model does. All models.