ResourcesIntegrationsLarge language models

OpenRouter

Connect OpenRouter and configure any model available to your account.

What is OpenRouter

OpenRouter provides a single API for language models from multiple model developers. Use the OpenRouter integration when you want your Vapi assistant to use a model available through your OpenRouter account.

Connect OpenRouter

Before using OpenRouter, connect your account on the Integrations page.

Language model

Set model.provider to openrouter. Set model.model to the exact text-generation model ID from the OpenRouter model catalog that your connected account can access.

$curl -X PATCH "https://api.vapi.ai/assistant/ASSISTANT_ID" \
>  -H "Authorization: Bearer $VAPI_API_KEY" \
>  -H "Content-Type: application/json" \
>  -d '{
>    "model": {
>      "provider": "openrouter",
>      "model": "YOUR_OPENROUTER_MODEL_ID"
>    }
>  }'

For additional configuration options, review the OpenRouterModel fields in the Create Assistant API reference.

OpenRouter models

Browse current model IDs, context windows, pricing, and capabilities.

Language models

Compare every language model provider Vapi supports.