Is an AI gateway different from an API gateway?

An AI gateway is specialized for LLM traffic. It understands tokens, model-specific rate limits, prompt/completion semantics, and cost per model. A general API gateway handles HTTP routing but lacks LLM-aware features like token budgeting, model fallback, and prompt logging.

AI Gateway

Written by Max Zeshut

Founder at Agentmelt · Last updated Sep 9, 2026

A proxy layer that sits between your application and one or more LLM providers, handling authentication, rate limiting, load balancing, fallback routing, cost tracking, and logging. AI gateways enable organizations to switch between LLM providers without changing application code, enforce usage policies, and maintain observability across all AI interactions. Examples include Portkey, LiteLLM, and cloud-provider offerings from AWS and Azure.

Example

Your support agent normally uses Claude for inference. When Anthropic's API returns a rate limit error, the AI gateway automatically falls back to GPT-4o—maintaining uptime without any code changes or manual intervention.

Frequently asked questions

Is an AI gateway different from an API gateway?: An AI gateway is specialized for LLM traffic. It understands tokens, model-specific rate limits, prompt/completion semantics, and cost per model. A general API gateway handles HTTP routing but lacks LLM-aware features like token budgeting, model fallback, and prompt logging.

See it as a workflow

Document & Proposal Generation Workflow

Trigger, steps, n8n nodes, guardrails and an importable template — plus what it costs to have it built.

Or skip the build

Workflows from $197/month, custom agents from $2,000.

Related glossary terms

Related niches

Back to glossary

Loading…