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
May 20, 2026
May 20, 2026
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May 19, 2026

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Product changes

  • Web fetch: Parallel engine — The web fetch server tool now supports Parallel as an engine option, bringing engine parity with web search.
  • Delete all chats in chatroom — Added a “Delete All Chats” option in the chatroom sidebar with a confirmation dialog for bulk-deleting all chat rooms at once.
  • Pareto Router default settings — The Pareto Router can now be configured with a default coding quality tier in workspace plugin settings, removing the need to pass min_coding_score on every API request.
  • Fixed: HTML-encoded characters in xAI tool-call arguments — xAI Grok models that intermittently emit &, <, or > inside tool-call argument JSON now have those entities decoded server-side so downstream clients receive clean arguments.
  • Fixed: compare page horizontal scroll at 4–5 models — The compare page now properly enables horizontal scrolling when comparing four or five models.

New models

  • xAI: Grok Build 0.1