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Grok Adopted as Vapi's Voice Engine

·2026.06.03 09:00

Key point

xAI's **Grok** has been adopted as the default voice engine for **Vapi** platform's 12 core voices.

Details

xAI has entered a partnership with Vapi to provide the default engine for over 2.5 million voice agents built on the Vapi platform. Through this collaboration, Grok's natural speech and rich emotional expression capabilities are applied to Vapi's 12 core voices.

According to Vapi's independent blind test results, Grok Voice ranked first in comparative evaluations against other providers. In user polls conducted on X, Grok's AI clone proved to be of such high quality that it was indistinguishable from a real human voice.

Developers can utilize the following features:

  • Vapi Dashboard: Instant access to Grok-based TTS (Text-to-Speech) and STT (Speech-to-Text) functions
  • Grok Voice API: Advanced customization support including new voices and custom voice cloning for narration, podcasts, advertisements, and more
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