Top 5 LLM Gateways for Production in 2026 (A Deep, Practical Comparison)

LLM gateways solve production challenges like latency spikes, provider outages, cost control, and observability when building with large language models. This comparison evaluates five production-ready gateways: Bifrost (Go-based, ultra-low latency, strong governance), Cloudflare AI Gateway (edge integration, caching), LiteLLM (Python, 100+ providers), Vercel AI Gateway (frontend-focused DX), and Kong AI Gateway (enterprise API management). Key evaluation criteria include performance under load, failover reliability, governance controls, and architectural fit. Bifrost excels at high-traffic systems with ~11 microseconds overhead at 5,000 RPS, while LiteLLM suits prototyping and Python teams. Choice depends on traffic scale, budget requirements, outage tolerance, and whether you prioritize flexibility or predictability.