OpenRouter
One API for 500+ models across 80+ providers.
OpenRouter · checked Oct 22, 2026
What it is
OpenRouter is a model router: one OpenAI-compatible API and key for hundreds of models, with auto-routing, fallbacks, budgets and prompt caching.
Use cases
- →Trying many models with one key
- →Fallbacks across providers
- →Cost/latency routing
Pros
- +500+ models, one key
- +Free models to start
- +Budgets and auto-routing
Cons
- −Platform fee on top of model costs
- −Another dependency in the path
Where it ranks
- #4 Best LLM APIs & Model Routers
One key for 500+ models with routing and fallbacks; 5.5% fee.
FAQ
How much does OpenRouter cost?
Free: 25+ free models, 50 requests/day. Standard pay-as-you-go with a 5.5% platform fee; Business 8%; Enterprise discounts. (As checked on 2026-10-22; confirm on https://openrouter.ai/pricing.)
What is OpenRouter best for?
#4 in Best LLM APIs & Model Routers: Trying and switching models fast.
What are the best alternatives to OpenRouter?
Claude API (Anthropic) (Claude models for coding and agents); OpenAI API (GPT-6 family models via API); Groq (Very fast inference for open models).
Is OpenRouter open source?
No, OpenRouter is a commercial product.