Best LLM Router / Comparisons / OpenRouter vs LiteLLM

OpenRouter vs LiteLLM

These two solve the same problem from opposite ends. OpenRouter is a hosted service: you buy credits once and call models from many providers through it. LiteLLM is software: you run its proxy on your own servers and point it at provider accounts you already hold.

In one line: Pick OpenRouter for reach and zero operations; pick LiteLLM for control and self-hosting.

Facts checked 11 Nov 2026 against each vendor’s public docs.

OpenRouter

Hosted routerHosted

A hosted marketplace router: one API and one credit balance for models from many providers, with provider routing, fallbacks and per-request privacy controls.

Pricing model
Provider price plus a fee on credits
ZDR on inference
Documented
Web search in the call
Yes, server-side
OpenRouter docs ↗

LiteLLM

Self-hosted gatewaySelf-hosted

An open-source Python SDK and proxy you run yourself: one OpenAI-format interface to 100+ providers, with retries, fallbacks, virtual keys and cost tracking.

Pricing model
Open source: you pay providers and hosting
ZDR on inference
Not documented
Web search in the call
Not documented
BerriAI docs ↗

Side by side

CriterionOpenRouterLiteLLM
Model coverageFrontier models from the major labs and open-weight models, served by many providers. The full list is on the models page and the models API.Source, checked 11 Nov 2026100+ LLM providers, including OpenAI, Anthropic, Vertex AI and Bedrock, called in the OpenAI format.Source, checked 11 Nov 2026
Latency overheadBuilt to add minimal latency, but no fixed overhead figure is published. Cold edge caches in a new region, low credit balances and failed providers can add latency.Source, checked 11 Nov 2026It runs in your infrastructure, so the overhead depends on where you deploy it and what you turn on. No figure is used here; measure it in your own setup.Source, checked 11 Nov 2026
Pricing modelProvider prices passed through with no markup on inference, plus a fee when you buy credits (rate on openrouter.ai/pricing). Your own provider keys cost 5% of the normal price above a plan-dependent free allowance.Source, checked 11 Nov 2026MIT-licensed outside the repository's enterprise/ directory, which has its own licence. You pay each provider directly, plus your own hosting.Source, checked 11 Nov 2026
Privacy termsPrompts and responses are not stored unless you opt in or content is flagged as potential CSAM. Zero Data Retention can be enforced globally, per model group, per guardrail or per request. Request metadata is stored.Source, checked 11 Nov 2026Requests go from your servers to the providers you configure with your own keys, so retention is set by you and by each provider's terms.Source, checked 11 Nov 2026
Routing and fallbacksProvider routing sorted by price, throughput or latency, model fallbacks, and general-purpose routers that pick a model per request.Source, checked 11 Nov 2026Built-in retry and fallback logic across deployments through its Router; the proxy adds virtual keys, cost tracking and an admin UI.Source, checked 11 Nov 2026

Control

LiteLLM gives you all of it: where it runs, which providers it may call, which keys each team gets, what is logged. OpenRouter gives you control through settings and request parameters (provider order, ZDR enforcement, guardrails) on infrastructure you don't run.

Cost model

OpenRouter passes provider prices through with no markup on inference and charges a fee when you buy credits; your own keys are free up to an allowance and 5% of the normal price above it. LiteLLM has no fee from the layer itself: you pay providers directly, plus the servers and time to run it.

Latency

Neither publishes a fixed overhead number. OpenRouter adds a hosted hop and documents what slows it (cold edge caches, low balances, failed providers). LiteLLM's overhead is whatever your deployment adds, so you can put it next to your app and measure it.

Privacy

With LiteLLM, prompts leave your network only to reach the providers you chose. With OpenRouter, prompts pass through OpenRouter, which does not store them unless you opt in or content is flagged as potential CSAM, and lets you enforce Zero Data Retention per request or account-wide.

Which suits whom

Choose OpenRouter if

  • You want many providers' models on one bill without opening accounts with each
  • You'd rather not run, scale and patch a proxy
  • You want provider failover and price sorting handled for you

Choose LiteLLM if

  • Traffic and keys must stay inside your own infrastructure
  • A platform team serves many internal apps and needs per-team keys and budgets
  • You want no fee from the routing layer and already hold provider accounts

Pick OpenRouter for reach and zero operations; pick LiteLLM for control and self-hosting.

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