How to Use OpenRouter With Any Coding Agent or AI Tool

OpenRouter is a versatile intermediary service that facilitates the connection between coding tools and various AI model providers through a single API key, simplifying the management of provider relationships, model catalogs, usage visibility, billing, and routing. It operates by allowing users to switch between more than 300 models across 60 providers by merely altering a model slug, streamlining the process of juggling multiple keys, billing dashboards, and configuration paths for different providers such as OpenAI, Anthropic, and Google. OpenRouter supports any tool compatible with the OpenAI Chat Completions API by requiring changes to only two values: the base URL and the key, enabling seamless integration across different platforms. It also offers automatic provider failover and manual model fallback to ensure reliability in multi-step tasks where agent state is maintained across numerous calls. Additionally, OpenRouter provides SDKs for Python and TypeScript to aid in building custom agents, and its cost structure includes a free tier with specific usage limits, with paid usage billed at the same rate as direct provider fees plus a small fee on credit purchases.

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