SpaceXSI releases Grok Voice 3.0, topping Artificial Analysis’ speech-to-speech index at $0.08/min
Confirmed
The takeaway
On Oct 14, 2026 SpaceXSI (formerly xAI) released Grok Voice 3.0, a speech-to-speech model for its Voice Agent API.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- 3 of 5
- Last verified
- 14 October 2026
Your AI and this story
- GPT-6 Astra167 days after its cutoff
- Claude Opus 5.5106 days after its cutoff
- Gemini 4 Argon197 days after its cutoff
- Grok 4.7136 days after its cutoff
None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 106 days before it.
Key facts
- Artificial Analysis Speech-to-Speech Index: 86.9 (Grok Voice 2.0: 81.3; GPT-Live-1: 83.2; Gemini 3.8 Live: 82.6), as reported by SpaceXSI with Oct 13 data
- Big Bench Audio 98.5%; Speech Agent Arena Elo 1070; task success 94.8%; Full Duplex Bench 97.0%; τ-Voice 71.6% (2.0: 56.5%); ServiceNow EVA-Bench 74% accuracy
- Latency: under one second; on τ-Voice, 40% lower latency than GPT-Live-1 (Astra, Medium)
- Price: $0.08/min ($4.80/hour), unchanged from 2.0; cost per Big Bench Audio task $0.025 vs $0.030 for GPT-Live-1 and $0.055 for GPT-Realtime-2.1
- API: Voice Agent API; agents on grok-voice-latest moved to 3.0 automatically; no pinned versioned model id is given on the announcement page
- Deployment claim: Starlink call centres take about 20,000 calls a day in several languages with Grok Voice; about 70% resolved without a human and about one in four sales calls ends in a purchase
What happened
Two and a half months after Grok Voice Think Fast 2.0, SpaceXSI shipped version 3.0 of its realtime voice model. All benchmark numbers come from SpaceXSI’s announcement; the Artificial Analysis leaderboard itself was not opened for this entry.
Why it matters
Realtime voice is the interface for call centres and in-car assistants. A same-price upgrade that claims the top independent speech-to-speech score raises pressure on OpenAI’s GPT-Live and Google’s Gemini Live pricing.
Sources
2 sources from 2 sites. Numbers match the chips in the text.
2 sources: 2 primary
Primary
- SpaceXSI: Introducing Grok Voice 3.0x.ai, official
- xAI docs: Voice Agent APIdocs.x.ai, docs
Changes
- Filed