Grok Voice just ranked #
1# on Vapi’s Humanness Index and it's scary good
That is a huge deal
This benchmark is simple:
Listeners hear blind same-voice battles and pick which voice sounds more human
Grok TTS scored 100 in humanness matching the human baseline
That means Grok is reaching human-level voice quality on one of the most important benchmarks for real AI agents
And Grok is doing this at $15 per 1M characters, while major competitors listed on the leaderboard are charging $60–$100
xAI is building world's best voice layers for real AI agents