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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DocsAPI ReferenceClient SDKsAgent SDKCookbookChangelog
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ModelsChatRankingsDocs

Changelog

A daily log of product changes, improvements, and new model releases on OpenRouter
April 5, 2026
April 5, 2026

Product changes

  • RAG guide — Published a new guide on building Retrieval-Augmented Generation pipelines using embeddings and rerank.
  • App slug-based URLs — Apps now support custom slug-based URLs for cleaner, shareable links to app pages.
  • Models API links field — The models API response now includes a links field with relevant external references for each model.
  • Rerank and embedding model pages — Chat button is now hidden on embedding and rerank model pages since these modalities don’t support chat.

New models

  • Cohere: Rerank v3.5
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