Top LLM Routing Tools of 2026: How Teams Pick the Right AI Gateway

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LLM routing tools act as intelligent proxies that direct AI inference requests across multiple providers based on cost, latency, and availability, removing this logic from application code. In 2026, five major solutions dominate production deployments: Bifrost, LiteLLM, OpenRouter, Kong AI Gateway, and RouteLLM, each suited to different infrastructure needs. Bifrost, an open-source Go-based gateway by Maxim AI, leads benchmarks with just 11 microseconds of proxy overhead at 5,000 requests per second. Production AI systems regularly face provider rate limits and outages, making hardcoded single-provider API calls a significant architectural risk. Engineering teams must weigh factors like proxy latency, routing flexibility, self-hosting requirements, and operational overhead when choosing a routing layer.

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