modelPrefer1mContext
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.
A new setting can make the model picker default to the 1M-context model variant.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.260.
In the changelogs
2Releases whose published page names modelPrefer1mContext.
-
v2.1.293
Remote policy changes to the 1M-context preference marked to apply without a restart
modelPrefer1mContextanddisableConfigDeprecationWarningsare now marked to take effect as soon as a remote policy changes themfound in this entry's text, named in this entry
-
v2.1.260
1M-context variant can now be the default picker selection
A new setting can make the model picker default to the 1M-context model variant.
found in this entry's text, named in this entry
First cited
1The earliest release whose published evidence quoted modelPrefer1mContext was v2.1.260, 3 Sep 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.