For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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DocumentationAPI ReferenceModel VersioningChangelog
DocumentationAPI ReferenceModel VersioningChangelog
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Changelog

Stay up to date on what’s shipping in the Extend platform.

April 6, 2026
April 6, 2026

Splitter Composer

Composer is now available for splitters, so you can optimize them automatically from eval sets. Previously, Composer was only available for extractors and classifiers.

If you’re working on splitting, check out our Splitter Benchmark to see how we evaluate models.

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