Which is cheaper: OpenRouter or LiteLLM?

At small scale LiteLLM is cheaper if you already run infrastructure — the gateway itself is free, you pay only provider usage. OpenRouter adds a 5.5% fee on credit purchases but removes hosting costs entirely. The crossover depends on your usage volume and infra budget; verify current prices on the official pricing pages.

Can I use both together?

Yes — LiteLLM can route to OpenRouter as one of its providers, which is a common pattern: you get LiteLLM's virtual keys and budgets on top of OpenRouter's model catalog. Both expose OpenAI-compatible APIs, so the setup is one base URL change.

Side-by-side comparison

OpenRouter vs LiteLLM: which AI gateway fits your stack?

OpenRouter and LiteLLM solve the same problem from opposite sides: one API for many LLM providers. OpenRouter is a hosted gateway you pay for per token with prepaid credits, while LiteLLM is a free open-source proxy you run yourself. PremiumPeek has not completed a same-input hands-on test; both pricing models below were verified on the official pages on 2026-08-14.

Official sources onlyPricing source-checkedNo invented score

OpenRoutervs

LiteLLM

Quick answer

Start from the job you need done — the winner is the fit, not the brand.

Choose OpenRouter if…

Developers and teams who want one API key for many models with hosted reliability, without running or maintaining any gateway infrastructure.

Read the OpenRouter profile

Choose LiteLLM if…

Developers and platform teams who want a self-hosted, free AI gateway with granular spend control, virtual keys, and fallbacks — without per-token platform fees.

Read the LiteLLM profile

Comparison table

The same fields are shown for both products so the comparison does not quietly favor one side.

Decision	OpenRouter	LiteLLM
Best for	Developers and teams who want one API key for many models with hosted reliability, without running or maintaining any gateway infrastructure.	Developers and platform teams who want a self-hosted, free AI gateway with granular spend control, virtual keys, and fallbacks — without per-token platform fees.
Core uses	Unified API access to many models without managing multiple keys, Hosted gateway with no self-hosting or maintenance, Enterprise model access with SSO and SLAs	AI gateway / LLM proxy, model routing and fallbacks, spend tracking and budgets, virtual API keys and teams
Pricing note	Pay-as-you-go with prepaid credits (USD); no per-token markup, 5.5% platform fee on credit top-ups. Free tier: 25+ free models, 4 free providers, 50 requests/day, 20 RPM / 1000 RPD after $10 lifetime credits. BYOK (bring-your-own-key) gets a $25k/mo free allowance on the platform fee. Enterprise: SSO/SAML, SLAs, custom. Verified.	Open source and self-hosted is free forever ($0): 100+ providers behind one OpenAI-compatible API with virtual keys, users and teams, spend tracking, budgets and rate limits, LLM fallbacks, request/response logging, and Prometheus metrics. Enterprise is priced annually by gateway request capacity (never per token) and adds SSO/SCIM, OIDC/JWT auth, audit logs, secret managers and key rotation, org and team admins, multi-region control plane, 24/7 support with SLAs, and air-gap deployment; a 30-day trial key is available without a credit card. Verified 2026-08-14 on litellm.ai/pricing.
Free plan	Yes — Free tier includes 25+ free models across 4 providers with 50 requests/day; limits scale with lif...	Free tier available
Main checks	Hosted: requests and metadata pass through OpenRouter's infrastructure Credit top-ups carry a 5.5% platform fee Free-tier rate limits are account-wide	Self-hosted: you run and maintain the gateway (PostgreSQL plus optional Redis), so uptime, upgrades, and operations are on you. Enterprise governance features (SSO/SCIM, audit logs, secret managers, SLAs) require the paid Enterprise edition. Independent open-source project (BerriAI) — not an official product of OpenAI, Anthropic, Google, or any listed provider.
Pricing source	Source-checked	Source-checked

The short answer

Choose OpenRouter when you want zero infrastructure: one API key, 500+ models from 80+ providers, and you pay prepaid credits with no per-token markup (a 5.5% platform fee applies to credit purchases, $0.80 minimum). Choose LiteLLM when you want a free, self-hosted gateway with virtual keys, budgets, rate limits, and fallbacks under your own control — at the cost of running and maintaining it yourself.

The decision is mostly infrastructure vs. fees: OpenRouter trades a small platform fee for hosted reliability; LiteLLM trades your ops time for zero per-token fees.

Pricing and free-plan differences

OpenRouter (verified on openrouter.ai/pricing, 2026-08-14): pay-as-you-go with prepaid USD credits, $0.80 minimum purchase. Provider prices are passed through at 0% markup; the platform charges a 5.5% fee on credit top-ups. A free tier gives 25+ free models from 4 free providers with a 50 requests/day rate limit. Enterprise and BYOK plans offer a fee discount after a free allowance.

LiteLLM (verified on litellm.ai/pricing, 2026-08-14): the open-source gateway is free forever to self-host — 100+ providers behind one OpenAI-compatible API, virtual keys, users and teams, spend tracking, budgets, rate limits, LLM fallbacks, request logging, and Prometheus metrics. Enterprise is priced annually by gateway request capacity (never per token) and adds SSO/SCIM, audit logs, secret managers, and 24/7 support; a 30-day trial key is available without a credit card.

Neither tool charges per-token markup on the model prices themselves — the difference is the 5.5% OpenRouter credit fee versus LiteLLM's self-hosting infrastructure cost (typically PostgreSQL plus optional Redis).

Workflow differences

OpenRouter is instant: sign up, buy credits, point any OpenAI-compatible client at the hosted endpoint. There is no server to run, no database to maintain, and fallback routing is built in. It suits teams that want one billable key and no ops burden.

LiteLLM requires a self-hosted proxy (Docker or pip), a database for spend tracking, and your own deployment discipline. In exchange you get virtual keys and per-key budgets, team-based access control, and full request/response logging inside your own infrastructure — features that matter for compliance and cost governance.

Both expose an OpenAI-compatible API, so the same client tools (Claude Code, Cursor, custom apps) can switch between them by changing one base URL.

Limitations to weigh

OpenRouter: you depend on a third-party service for uptime, and the 5.5% credit fee plus prepaid balance model means cash is locked in advance. Free-tier models have a 50 requests/day cap.

LiteLLM: self-hosting means you own uptime, upgrades, key security, and the database; there is no fully managed free option. Enterprise governance features (SSO, audit logs, SLAs) require the paid edition.

For a third comparison point, OmniRoute is a free open-source gateway with a strong free-provider focus — see the OmniRoute vs OpenRouter comparison in this directory.

Questions creators ask

Which is cheaper: OpenRouter or LiteLLM?: At small scale LiteLLM is cheaper if you already run infrastructure — the gateway itself is free, you pay only provider usage. OpenRouter adds a 5.5% fee on credit purchases but removes hosting costs entirely. The crossover depends on your usage volume and infra budget; verify current prices on the official pricing pages.
Can I use both together?: Yes — LiteLLM can route to OpenRouter as one of its providers, which is a common pattern: you get LiteLLM's virtual keys and budgets on top of OpenRouter's model catalog. Both expose OpenAI-compatible APIs, so the setup is one base URL change.

Continue the decision

Use the source-checked profiles and workflow guide before selecting a paid plan.

Read the OpenRouter profileOpen →Read the LiteLLM profileOpen →Read the OmniRoute profileOpen →OmniRoute vs OpenRouterOpen →Browse AI tool comparisonsOpen →

Sources

Verify changing features, pricing, and usage rights before purchasing.