From the source
Grok Voice 3.0 is a SpaceXAI speech-to-speech model that listens, reasons, calls tools and speaks.
It now ranks first on the Artificial Analysis Speech-to-Speech Index with a score of 86.9.
For developers, the endpoint, events and $0.08 per minute price are unchanged from Grok Voice 2.0.
TL;DR Runs on: SpaceXAI’s hosted Voice Agent API only.
No open weights, no local or quantized variants.
Performance: Highest Index score of any model Artificial Analysis currently ranks.
Best: 86.9 on the AA Speech-to-Speech Index, ranked #1.
Worst: 71.6% on τ-Voice, behind GPT-Live-1 (Astra, medium) at 74.5%.
Bottom line: Best: top composite score at 0.81 s time to first audio.
Worst: not the leader on agentic task resolution or raw speech reasoning.
What is Grok Voice 3.0?
Grok Voice 3.0 is SpaceXAI’s flagship realtime voice model, exposed as grok-voice-3.0 on the /v1/realtime WebSocket endpoint .
The grok-voice-latest alias already points to it, so existing agents switched automatically.
SpaceXAI has not published parameter counts or architecture details.
…