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LiteLLM Review 2026 — Unified API for 100+ LLMs

LiteLLM provides a unified OpenAI-compatible API for 100+ LLMs. Open-source proxy with fallbacks, cost tracking, and rate limiting for production AI applications.

LiteLLM Review 2026 — Unified API for 100+ LLMs

LiteLLM lets platform teams and developers access multiple model providers through an OpenAI-compatible API. It provides routing, retries and fallbacks, virtual keys, spend tracking, budgets, rate limits, logging, and guardrails.

The open-source gateway is self-hosted and free. Enterprise adds SSO, SCIM, audit logs, secret management, multi-region control, air-gapped deployment, support, and SLAs; pricing is based on annual gateway capacity and deployment needs.

Features

  • OpenAI-compatible API for 140+ providers and 1,800+ models
  • Routes requests across providers, regions, deployments, and keys
  • Retries failed requests and provides LLM fallbacks
  • Tracks spend by key, user, team, organization, tool, or agent
  • Sets budgets, rate limits, model access rules, and guardrails
  • Provides request logging and integrations with observability tools
  • Supports virtual keys, SSO, JWT/OIDC authentication, and audit logs
  • MIT-licensed open-source gateway

Use cases

  • Centralize access to multiple LLM providers behind one API
  • Route requests to lower-cost or higher-capability models
  • Track and charge back model usage across teams
  • Cap spending and rate limits for production AI applications
  • Provide controlled access to agents and MCP servers
  • Run an AI gateway in self-hosted or air-gapped environments

Pros

    Cons

      Pricing

      Starting price
      Talk to sales
      Pricing checked
      2026-09-19

      Open Source

      $0

      • Free forever and self-hosted
      • 100+ providers with one OpenAI API
      • Virtual keys, users, and teams
      • Spend tracking, budgets, and rate limits
      • LLM fallbacks, logging, and Prometheus metrics

      Enterprise

      Talk to sales

      • Everything in Open Source
      • SSO, SCIM, OIDC/JWT, and audit logs
      • Secret managers and key rotation
      • Organization and team administrators
      • Multi-region control plane and air-gapped deployment
      • Dedicated support, onboarding, and SLAs
      Official website