Top 5 Enterprise AI Gateways for Dynamic Routing in 2026

If you are running multiple LLM providers in production, routing logic becomes a critical infrastructure decision. Send everything to one provider and you get single points of failure. Hardcode routing rules and you lose flexibility when latency spikes or rate limits hit. I spent the last few weeks evaluating five AI gateways specifically for their dynamic routing capabilities. The criteria: latency overhead, failover behaviour, weighted distribution, and how much config it takes to get routing working in production.