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.
ModelsChatRankingsDocs
DocsAPI ReferenceClient SDKsAgent SDKCookbookChangelog
DocsAPI ReferenceClient SDKsAgent SDKCookbookChangelog
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ModelsChatRankingsDocs

Changelog

A daily log of product changes, improvements, and new model releases on OpenRouter
May 9, 2026
May 9, 2026

Product changes

  • Fixed: collapsible sections in chatroom responses — Assistant messages in the chatroom once again render markdown-embedded HTML such as <details> / <summary> blocks and inline tags like <b>.
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