{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2026-07-01-xai-grok-voice-agent-builder/","md":"https://postcutoff.com/e/2026-07-01-xai-grok-voice-agent-builder/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2026-07-01-xai-grok-voice-agent-builder","date":"2026-07-01","date_precision":"day","short_title":"xAI launches Grok Voice Agent Builder, a no-code platform for phone voice agents","deck":null,"takeaway":null,"category":"product","category_label":"Products","importance":2,"confidence":"medium","status":{"key":"partly","labels":["Partly confirmed"]},"sources":[{"n":1,"title":"SpaceXAI: Introducing the Voice Agent Builder","url":"https://x.ai/news/grok-voice-agent-builder","type":"official","group":"primary","domain":"x.ai"},{"n":2,"title":"SpaceXAI: Voice Agent Builder product page","url":"https://x.ai/voice","type":"official","group":"primary","domain":"x.ai"},{"n":3,"title":"Slator: xAI Releases No-Code Voice Agent Builder","url":"https://slator.com/xai-releases-no-code-voice-agent-builder/","type":"press","group":"press","domain":"slator.com"}],"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["xAI","SpaceX"],"title":"xAI launches Grok Voice Agent Builder, a no-code platform for phone voice agents (beta)","summary":"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)"],"key_numbers":[],"tags":["xai","grok","voice","voice-agents","no-code","telephony","mcp"],"science":null,"body_md":"## What happened\n\nxAI 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.\n\n## Why it matters\n\nFrontier 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.","disputed":[],"related":[{"id":"2026-07-29-grok-voice-think-fast-2","url":"https://postcutoff.com/e/2026-07-29-grok-voice-think-fast-2/","date":"2026-07-29","date_precision":"day","short_title":"xAI releases Grok Voice Think Fast 2.0 speech-to-speech model for voice agents","deck":null,"takeaway":"Its reported AA S2S Quality Index (82.9) put it roughly level with Google's Gemini 3.8 Live Extended Thinking (82.6, Sept 2026) and marked xAI's push to compete on voice agents on price.","category":"model-release","category_label":"Model releases","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":4,"official":4,"filed":"2026-09-29","updated":"2026-09-29","orgs":["xAI","SpaceX"]}],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":62,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":1,"in_training_data":false},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":92,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":31,"in_training_data":false}],"short_url":null}