fable
A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
The full Claude Desktop managed-config schema, covering MCP policy and egress limits, is now bundled in.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.232.
In the changelogs
15Releases whose published page names fable.
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v2.1.321
Fable 5.1 model choices are moved to the
fablealias at startupIf your saved model is Fable 5.1, Claude Code switches it to the
fablealias, with a delayed move for team and enterprise organisationsfound in this entry's text, named in this entry
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v2.1.314
The fable model aliases resolve in more cases
The
fableandfable[1m]aliases now map to a model in more cases, and the 1M-context check adds an extra model-family testfound in this entry's text, named in this entry
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v2.1.310
Short model names work beyond Anthropic's own API, and fable is recognised
Short model names such as opus and sonnet are no longer limited to Anthropic's own API, and fable is now recognised as one
named in this entry
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v2.1.307
Plugin refresh,
/subtaskand a newwritersettingPlugin refresh now marks fresh loads,
/subtaskwas reorganised, and settings gain awriterentry withfableandopusvaluesfound in this entry's text
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v2.1.304
Session limit reset command can show a hint for which limit to reset
The command that resets a session limit can now show the argument hint [fable|full|5-hour|weekly]
found in this entry's text
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v2.1.287
Model picker can use the short name for the fable model family
Model picker entries in the fable family can now be stored under the short name 'fable' when that name points to the same model
found in this entry's text, named in this entry
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v2.1.287
Choosing Fable in the model picker now always saves
fablePicking Fable in the model picker now always stores the short name
fableinstead of whatever full model name was passed infound in this entry's text, named in this entry
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v2.1.284
--modelhelp text no longer gives an example full model nameThe help text for
--modelnow ends with "or a model's full name." and no longer shows an example full model namenamed in this entry
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v2.1.257
Automatic migration of
claude-fable-5model alias tofableIf your model setting says claude-fable-5, startup rewrites it to the fable alias automatically.
named in this entry, found in this entry's text
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v2.1.257
Fable 5.1 prompt bundle gate
A fable_5_1_prompt_bundle gate special-cases the fable model family in naming and in forcing thrifty mode.
found in this entry's text
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v2.1.232
The managed-configuration schema and Zod 4 are bundled into the CLI
The full Claude Desktop managed-config schema, covering MCP policy and egress limits, is now bundled in.
found in this entry's text
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v2.1.195
Model Catalog: New and Updated Models
found in this entry's text
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v2.1.173
Fable model support
found in this entry's text
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v2.1.170
Claude Fable 5 Model Support
found in this entry's text
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v2.1.170
Settings Documentation Updated for Fable
found in this entry's text
First cited
0No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.
Presence across releases
0The 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 settings key does. All settings keys.