xAI launches Grok Voice Agent Builder, a no-code platform for phone voice agents
Partly confirmed
Status
- Claim
Partly confirmed
- Our reporting
- Medium confidence
- Importance
- 2 of 5
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 Astra62 days after its cutoff
- Claude Opus 5.51 day after its cutoff
- Gemini 4 Hydrogen92 days after its cutoff
- Grok 4.731 days after its cutoff
None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 1 day before it.
Key facts
- Launch 2026-07-01, beta (x.ai news post); ‘Create a personalized voice agent in under 2 minutes without a single line of code’
- Runs on one Grok Voice speech-to-speech model rather than a stitched STT -> LLM -> TTS pipeline
- Price: the x.ai post (read 2026-09-29) lists $0.08 per minute of audio (API rate) plus $0.01/min telephony on a provisioned number, no platform fee; Slator (2026-07-07) reported ‘from $0.05 per minute’. The discrepancy is unresolved
- 25+ languages; voice cloning; integrations incl. Google/Outlook Calendar, email, web and X search, Linear, Notion, Google Drive, OneDrive; human transfer; SIP or phone-number deployment
- xAI-reported tau-voice Bench: Grok Voice Think Fast 1.0 67.3% vs Gemini 3.1 Flash Live 43.8% and GPT Realtime 1.5 35.3%
- Competes with ElevenLabs (ElevenAgents), Retell AI, Vapi, Synthflow and PolyAI (Slator)
What happened
xAI added a no-code layer on top of its Voice Agent API. Operators describe a call flow in plain language, attach documents and tools, test in the browser and deploy to a phone number or SIP trunk. Four weeks later (2026-07-29) the underlying model was upgraded to Grok Voice Think Fast 2.0.
Why it matters
Frontier labs moved into the voice-agent platform market that had belonged to ElevenLabs, Vapi and Retell. xAI’s pitch was a single end-to-end speech model with telephony bundled, instead of a cascade built from several vendors. The per-minute price is unclear (see key facts), so confidence is medium.
Sources
3 sources from 2 sites. Numbers match the chips in the text.
3 sources: 2 primary, 1 press
Primary
- SpaceXAI: Introducing the Voice Agent Builderx.ai, official
- SpaceXAI: Voice Agent Builder product pagex.ai, official
Press
- Slator: xAI Releases No-Code Voice Agent Builderslator.com, press
Changes
- Filed