Hosted Service
Inference & Serving
OpenRouter
1One 2API 3for 4many 5LLM 6providers.
the six Ws · specification
W1
Who
By OpenRouter.
W2
What
A unified API routing requests across hundreds of models and providers.
W3
Where
A hosted gateway called over HTTPS.
W4
When
When you want provider choice behind one key.
W5
Why
Switch models and providers without code changes.
W6
With
An API key and outbound HTTPS.
W7
Watch
Commercial routing service, API key; your prompts pass through to upstream providers.
alternatives
GatewayRoutingMulti-model