Meet Grok Voice 3.0: SpaceXAI's Voice Agent Model Ranks #1 on Artificial Analysis
By Michal Sutter — October 14, 2026
SpaceXAI has released Grok Voice 3.0, a 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 pricing—$0.08 per minute—remain 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.
via MarkTechPost