Smart model routing directly in Claude, Codex and Cursor
We built a model router that plugs into coding agents (e.g. Claude Code, Codex, Cursor, etc.) and intelligently sends requests to the best model to serve them. Here's a quick demo of running it locally: https://www.youtube.com/watch?v=isKhAyivtfM. At Weave, we write most of our code with AI, and it's been getting more expensive. This came to a head when Opus 4.7 was released and, thanks to its tokenizer changes, our costs shot up. We knew we didn't need Opus for everything but we didn't want to lose out on the intelligence for the cases where you really need it. So we decided…
Smart model routing directly in Claude, Codex and Cursor launched on June 26, 2026 with 216 votes, #131 of 22,647 launches that month and more than 99% of that year's launches.
In plain words
Weave Router is a model routing tool that integrates with coding agents like Claude Code, Codex, and Cursor to intelligently direct requests to the most appropriate AI model. It functions as an Anthropic and OpenAI endpoint, analyzing each inference request and routing it based on complexity and requirements while handling necessary model translations. Built for developers using AI extensively for coding, it aims to optimize costs by using less capable models for simpler tasks while preserving access to advanced models when needed.
written from the facts on this page · September 2026
From the sources
Model router for agentic systems. Routes every prompt to the right model in <50ms. Cut costs 40-70% with just an endpoint change. - weave-os/router
In the maker’s words, at launch
We built a model router that plugs into coding agents (e.g. Claude Code, Codex, Cursor, etc.) and intelligently sends requests to the best model to serve them. Here's a quick demo of running it locally: https://www.youtube.com/watch?v=isKhAyivtfM. At Weave, we write most of our code with AI, and it's…
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