maxThinkingTokens
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.
SDK message and control-protocol schemas were restructured with no change to fields or defaults.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.224.
In the changelogs
4Releases whose published page names maxThinkingTokens.
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v2.1.281
SDK options: disallowedTools parsed; maxThinkingTokens check fixed
SDK options now read disallowedTools, and the maxThinkingTokens whole-number check now checks the right value
named in this entry, found in this entry's text
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v2.1.242
SDK sessions can set max thinking tokens and thinking display at startup
SDK sessions can set a thinking token limit and thinking display when they start.
found in this entry's text
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v2.1.224
SDK schema definitions restructured
SDK message and control-protocol schemas were restructured with no change to fields or defaults.
found in this entry's text
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v2.1.47
Adaptive Thinking with --thinking Flag
found in this entry's text
First cited
1The earliest release whose published evidence quoted maxThinkingTokens was v2.1.224, 7 Aug 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.