Vercel AI Gateway

Overview

Vercel AI Gateway is a hosted proxy that gives you a single endpoint and a single API key for hundreds of AI models across OpenAI, Anthropic, Google, xAI, Mistral, and more. Switch providers by changing a model string, not your code. Built-in automatic failover, spend monitoring, embeddings support, and Bring Your Own Key (BYOK) with no token markup. Distinct from the Vercel AI SDK, which is the TypeScript library that calls into it.

Best for

Best for
Teams who use multiple LLM providers and want unified access, observability, and failover

Use cases

• Swap LLM providers or models across a production app without rewriting API calls
• Set team spend budgets and monitor token costs across every provider in one place
• Add automatic failover so one provider outage does not take down your app
• Use a single API key across OpenAI, Anthropic, and Google from any language or framework

Notes

Why it matters

Multi-provider LLM apps have a consistent problem: each provider has a different API shape, different SDK, different key. The Gateway collapses that into one endpoint. The zero-markup BYOK model means there is no cost reason to go direct once you are inside the Vercel ecosystem.

How teams use it in production

Wire the Gateway endpoint in place of a direct provider endpoint. Set spend alerts per app or per team. When a provider has an outage, the automatic failover kicks in without any code change. Pair with Langfuse for deeper trace-level observability on top of the Gateway’s built-in spend monitoring.

What to watch

The Gateway is the Vercel bet that provider routing belongs at the platform layer, not the SDK layer. The competition (LiteLLM, Portkey, OpenRouter) is real. Vercel’s edge is zero-markup BYOK and tight AI SDK integration. The question is whether the platform lock-in is worth the convenience for teams not already on Vercel.