xAI Grok Voice Becomes Default Engine for Vapi's 2.5M+ Voice Agents

xAI

Audio official 1 src. ~1 min

xAI announced on June 3 a partnership making Grok Voice the default engine for Vapi's 12 core voices, powering over 2.5M voice agents built on the platform. In Vapi's blind arena evaluation, Grok Voice ranked first for naturalness and emotional range.

Why it matters

Signals Grok Voice reaching production-grade quality competitive with ElevenLabs at enterprise scale.

Importance: 2/5

Official xAI announcement; notable distribution win placing Grok Voice as default for 2.5M+ deployed agents.

grok xai voice-agents tts api partnership

Sources

official Grok Becomes the Voice of Vapi — xAI