Google

Google provides speech-to-text for Vapi voice agents.

You can use Google through Vapi’s default integration, or connect your own account in Integrations.

Supported capability

Speech-to-text

Set transcriber.provider to google and transcriber.model to a Gemini model.

curl -X PATCH "https://api.vapi.ai/assistant/ASSISTANT_ID" \
  -H "Authorization: Bearer $VAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "transcriber": { "provider": "google", "model": "gemini-2.5-flash" }
  }'

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

When transcriber.model is omitted, Vapi uses gemini-3.1-flash-lite. Vapi defaults Google transcription to English. Set transcriber.language to Multilingual to use multilingual transcription; the value is case-sensitive. Google’s available languages describe provider-level coverage, while the table below contains the language values accepted by Vapi.

Supported languages

The following language values are currently accepted by Vapi for this provider.

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