unpinFable5LaunchEffort
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.
Three model 'launch-effort pinning' config fields were removed from the default client settings
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.280.
In the changelogs
3Releases whose published page names unpinFable5LaunchEffort.
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v2.1.280
Model launch-effort pinning flags removed from client config
Three model 'launch-effort pinning' config fields were removed from the default client settings
found in this entry's text
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v2.1.280
New models are unpinned from launch-time forced effort by default; existing installs stay pinned
Newly launched models like claude-opus-4-7 and claude-fable-5 stay pinned to a launch effort level unless unpinned, but only on installs that predate this build
named in this entry, found in this entry's text
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v2.1.170
Effort Flag Passthrough Now Requires All Three Models Launched
found in this entry's text
First cited
1The earliest release whose published evidence quoted unpinFable5LaunchEffort was v2.1.170, 9 Jun 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.
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.