OpenRouter vs LiteLLM: Which LLM Router Should You Use?
OpenRouter vs LiteLLM compared: hosted routing vs self-hosted SDK, pricing, features, and which LLM router fits your team's AI stack in 2026.
OpenRouter and LiteLLM both let you call many models through one interface, but they are built differently: OpenRouter is a hosted service; LiteLLM is an SDK/proxy you run yourself. The choice is mostly hosted vs self-hosted.
OpenRouter
- Hosted: nothing to deploy, one API key.
- Wide model catalog across providers.
- Billing through OpenRouter — one invoice.
- Good for quick experimentation and small teams.
LiteLLM
- Self-hosted: you run the proxy or use the SDK.
- Bring your own keys and keep billing with providers.
- Deep control: budgets, load balancing, retries.
- More setup and ops responsibility.
Head-to-head
- Deployment: hosted (OpenRouter) vs self-managed (LiteLLM).
- Billing: one OpenRouter invoice vs your own provider bills.
- Keys: OpenRouter manages; LiteLLM uses yours.
- Control: LiteLLM wins on custom policies; OpenRouter wins on speed.
Privacy and compliance
If data must stay in your infrastructure, self-hosted routing (LiteLLM) wins. If your data policy permits a hosted provider, OpenRouter is faster to adopt.
FAQ
What is the difference between OpenRouter and LiteLLM?+
OpenRouter is a hosted multi-model API. LiteLLM is a self-hosted SDK/proxy. Hosted vs self-managed is the core trade-off.
Is LiteLLM free?+
The open-source SDK is free to run; you pay for your own infrastructure. OpenRouter charges per token with some markup over provider rates.
Can I use both?+
Yes — e.g., use OpenRouter for quick access and LiteLLM behind it for policy, budgets, and key management at scale.
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