haiku
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.
Rate-limit prompts now resolve model aliases, so you get fewer misdirected limit warnings.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.234.
In the changelogs
4Releases whose published page names haiku.
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v2.1.284
Model aliases like opus now pick the first matching model in a configured list
With a configured model list, opus, sonnet and haiku now map to the first model of that family in the list, not the canonical claude- ID
named in this entry, found in this entry's text
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v2.1.234
Rate-limit prompts resolve model aliases to the model that actually answers
Rate-limit prompts now resolve model aliases, so you get fewer misdirected limit warnings.
found in this entry's text
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v2.1.166
fallbackModelsetting in settings.jsonfound in this entry's text
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v2.1.30
Enhanced Custom Subagent Schema
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.