xAI Voice Agent Builder
xAI's no-code platform for building and deploying human-like voice agents powered by Grok Voice, with an API for support, sales, and custom call flows.
Updated 2026-07-02
No free tier is documented for xAI Voice Agent Builder.
Listed pricing: Usage-based from $0.05/min.
Overview
Voice Agent Builder is xAI's no-code platform for building, testing, and deploying real-time voice agents that field phone calls and conversations without a human on the line. Launched July 1, 2026, it wraps xAI's Grok Voice speech model in a visual builder — you define the agent's persona, goals, and call logic, then deploy it for inbound or outbound tasks like customer support, appointment booking, lead qualification, and sales outreach. An API sits alongside the builder for teams that want to wire agents into existing telephony, CRMs, or internal tools programmatically.
The pitch is the same one Vapi, Retell AI, and Bland AI have been making — turn an LLM into a low-latency phone agent — but with xAI's own stack top to bottom. Instead of stitching a third-party STT model, an LLM, and a TTS voice together, Voice Agent Builder runs on Grok Voice natively, which is xAI's bet on tighter latency and more natural turn-taking. For anyone already building on the Grok API, it collapses the voice-agent pipeline into a single vendor.
Pricing is usage-based, starting at $0.05 per minute — competitive on paper with the incumbent voice-agent platforms, which typically layer platform fees on top of separate model and telephony costs. What's still unclear from launch materials is exactly what that per-minute rate bundles (telephony, model inference, and concurrency limits often live in separate line items across this category), so check the current pricing page before you model call volume at scale.
Is xAI Voice Agent Builder free?
No free tier is documented for xAI Voice Agent Builder.
Listed pricing: Usage-based from $0.05/min.
No figure is estimated here for what is not published. Check xAI Voice Agent Builder's own site for the current terms.
Pricing on this page has not been re-verified. The entry was last edited on , and no separate pricing check has been run since. Treat the figures as a record of what was published then and confirm on the official site.
xAI Voice Agent Builder pricing
| Plan | Price | What's included |
|---|---|---|
| Usage-based | From $0.05/min | Pay-per-minute of voice agent runtime; no-code builder plus API access. Exact inclusions (telephony, inference, concurrency) — check website for current pricing. |
Pay-per-minute of voice agent runtime; no-code builder plus API access. Exact inclusions (telephony, inference, concurrency) — check website for current pricing.
Pricing on this page has not been re-verified. The entry was last edited on , and no separate pricing check has been run since. Treat the figures as a record of what was published then and confirm on the official site.
Is xAI Voice Agent Builder worth it?
Worth it for Support and sales teams deploying phone-based voice agents for support calls, appointment booking, and outbound lead qualification.
There is no free tier to test it on, so the plans above are the entry cost. The recorded trade-offs are listed below, and any one of them can settle the question on its own.
The 8.2/10 AI Score is an editorial read of published capability, price and shipping pace. Nobody here has hands-on hours with xAI Voice Agent Builder. How we verify.
Worth it if
The strengths recorded against this entry.
- No-code builder lowers the barrier to shipping a working voice agent versus stitching an STT + LLM + TTS pipeline yourself
- Single-vendor stack on Grok Voice avoids gluing together separate model providers, which can simplify latency and billing
- Usage-based $0.05/min entry rate is competitive with established voice-agent platforms
- Both a visual builder and an API cover no-code users and engineering teams that need deeper integration
- Backed by xAI's Grok model line, so it inherits the same underlying LLM improvements
Not worth it if
Any one of these blocks your use case.
- No free tier — you pay per minute from the first call, unlike rivals that offer trial credits
- Brand-new (launched July 2026), so real-world reliability, latency, and language coverage are unproven
- What the $0.05/min rate actually bundles (telephony, concurrency, inference) isn't clearly spelled out at launch
- Enters a crowded field against more mature platforms like Vapi, Retell AI, and Bland AI with existing integrations and track records
What sets xAI Voice Agent Builder apart
- Runs natively on xAI's own Grok Voice model instead of a third-party STT/LLM/TTS stack
- Pairs a no-code visual builder with a full API for deeper integration
- Usage-based pricing starting at $0.05 per minute
- Single-vendor stack simplifies latency and billing for teams already on the Grok API
Key features
No-code builder
A visual interface for defining an agent's persona, objectives, and conversation logic, so non-engineers can stand up a working voice agent without writing call-handling code.
Grok Voice engine
Runs on xAI's own real-time speech model rather than a third-party TTS/STT stack, aiming for lower latency and more natural, human-sounding turn-taking during live calls.
API integration
A programmatic API lets teams embed agents into existing telephony systems, CRMs, and internal tools, or drive outbound campaigns at scale beyond the visual builder.
Task-oriented deployment
Built for concrete jobs — customer support, sales outreach, lead qualification, and custom call flows — rather than open-ended chat, with immediate availability from the July 1, 2026 launch.
How it compares
| Tool | Best for | Pricing | Score |
|---|---|---|---|
| xAI Voice Agent Builder | Support and sales teams deploying phone-based voice agents for support calls, appointment booking, and outbound lead qualification. | Usage-based from $0.05/min | 8.2/10 |
| ChatGPT vs ChatGPT → | Users who want one subscription covering reasoning, voice, vision, image and video generation, and agentic browsing in a single app. | Free tier + Plus $20/mo + Pro $200/mo | 9.5/10 |
| Claude vs Claude → | Developers and professionals who need agentic coding, computer control, and large-document or codebase analysis in one assistant. | Free tier + Pro $20/mo + Team $30/mo/user | 9.5/10 |
| Gemini vs Gemini → | Google Workspace users who want an assistant that can read their Gmail, Drive, and Calendar while reasoning across huge documents or videos in one pass. | Free tier + Advanced $19.99/mo | 9.2/10 |
Learn to use xAI Voice Agent Builder
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Related reading
xAI Launches Grok Voice Agent Builder Beta
xAI's no-code Grok Voice Agent Builder ships in beta at $0.05/min with unified STT/LLM/TTS and telephony. What it changes for phone agents.
Mistral €3bn Round Meets OpenAI Wiki Disclosure
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Mistral Closes €3B Series D at €21B Valuation
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