Workweave Router: A model routing proxy for AI agent systems that cuts costs by 40-70%
By
adchurch
Summary
Workweave's Router is a model routing tool for agentic AI systems that acts as a drop-in proxy for Anthropic, OpenAI, and Gemini APIs. It uses a tiny on-box embedder (not prompt-based heuristics) to route each request to the best model in under 50ms, claiming 40-70% cost reduction. It ranks #1 on the RouterArena leaderboard and is built by Weave, an engineering intelligence platform used by companies like Robinhood and PostHog.
Source
Key quotes
· 3 pulledOne endpoint. Every model. Always the right one.
A drop-in proxy for Anthropic, OpenAI, and Gemini that picks the best model for every request: using a tiny on-box embedder, not a vibes-based prompt.
Routes per request. A cluster scorer derived from Avengers-Pro 2 picks the right model from your enabled providers.
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