Grok Voice 3.0 is xAI’s speech-to-speech model for voice agents, which xAI calls the world’s most intelligent. It ranks #1 on the Artificial Analysis Speech-to-Speech Index at 86.9, with latency under one second per xAI. It powers voice in Tesla vehicles and Starlink support calls. Available through the Voice Agent API at $0.08 per minute, same as Grok Voice 2.0. Agents on grok-voice-latest switched to 3.0 automatically.