xAI launches Grok Voice Agent Builder, a no-code platform for phone voice agents (beta)
On 2026-07-01 xAI (branded SpaceXAI) released the Grok Voice Agent Builder in beta: a browser-based, no-code tool that turns a plain-language description of a phone call into a live voice agent running on its single Grok Voice speech-to-speech model, with telephony, knowledge retrieval, tools/MCP, guardrails and call review bundled.
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.
Changelog
- 2026-09-29: created
Related events
- xAI releases Grok Voice Think Fast 2.0 speech-to-speech model for voice agents ★★★
- ElevenLabs launches Reception, an AI phone receptionist for small businesses built on ElevenAgents ★★
Sources (3)
- officialSpaceXAI: Introducing the Voice Agent Builder
- officialSpaceXAI: Voice Agent Builder product page
- pressSlator: xAI Releases No-Code Voice Agent Builder
id: 2026-07-01-xai-grok-voice-agent-builder · updated 2026-09-29 · open in the interactive timeline