- Grok has become the voice of Vapi, bringing frontier voice quality to millions of Vapi agents.
- This partnership will serve as the default engine for Vapi's 12 core voices, enhancing the naturalness and emotional range for the 2.5M+ voice agents built on the Vapi platform.
- Grok achieved the #1 spot in an independent evaluation by Vapi comparing various voice providers.
- In a poll among users, results showed a 50/50 split in guessing which voice was Grok versus a human original, indicating the high quality of Grok's voice.
- Grok's Speech-to-Text and Text-to-Speech capabilities are now accessible in the Vapi Dashboard.
- New voices and advanced customization options, including custom voice cloning, can now be integrated through the Grok Voice API for various applications.
Grok's partnership with Vapi is set to revolutionize the capabilities of virtual voice agents, enhancing over 2.5 million agents' performance with cutting-edge voice technology.1356
The collaboration allows Vapi to utilize Grok's advanced text-to-speech capabilities, making them the default engine for Vapi's 12 core voices, thereby adding naturalness and emotional range that improves user experience.2
In an independent evaluation, Vapi found that Grok's voice technology outperformed competitors and achieved the #1 spot in a head-to-head comparison. The results reflect the sentiment of users, as evidenced by a side-by-side poll on X, where over 4,500 users struggled to discern between Grok's AI voice and the human original.
For those who are already utilizing Vapi, Grok's capabilities are readily available through the Vapi Dashboard, allowing for an easy transition to enhanced voice functionality.
In addition to text-to-speech, Grok provides powerful Speech-to-Text solutions and offers new voices along with customized options, including voice cloning. These advancements open new avenues for applications such as narration, podcasts, and advertising—all designed to deepen audience engagement.
“Grok has officially become the voice of Vapi, enhancing voice quality for over 2.5 million voice agents. The integration allows users to access advanced customization options and natural-sounding voices through Vapi's platform.”
