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This article details configuring Kilo Code with OpenRouter to enable access to over 300 models via a unified API key, focusing on routing logic, failover mechanisms, and billing management within a coding agent workflow. The technical setup allows developers to bypass proprietary model limitations by leveraging external provider layers for inference tasks.
Kilo Code + OpenRouter: Setup, Model Routing, and Free Models

Kilo Code is a bring-your-own-provider coding agent, so adding OpenRouter gives it one key for hundreds of models, provider routing, and failover. Here's the three-step setup plus the kilo.json fields that control routing.
Kilo Code runs the coding session: chat, edits, context, modes, and the model picker inside your editor or terminal. It doesn’t ship its own models. It expects you to bring a provider. OpenRouter is that provider layer. Add it and Kilo gets one API key for 300+ models across 70+ providers, plus routing rules, failover, and billing in one place. Kilo also offers Kilo Gateway, its own managed-billing path, which we compare below. The whole setup is three steps, and the routing controls live in one config file. The…
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