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Smart router that selects from free models based on your request
Founded in 2023 and headquartered in San Francisco, OpenRouter operates a model-routing gateway and API that provides a single interface to over 400 LLMs from dozens of providers. Rather than training models, it acts as the aggregation and routing layer for the LLM marketplace, handling billing, rate limiting, and failover across providers and exposing a unified chat-completions API. Its $113M Series B in 2026 cemented the gateway-as-a-platform model.
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