AI BriefingxAI Launches Voice Agent Builder
Key point
xAI has released a beta version of Voice Agent Builder, which lets users build high-performance voice agents in 2 minutes without writing a single line of code.
Details
xAI has unveiled Voice Agent Builder, a no-code platform built on Grok Voice, in beta. This platform brings together phone connectivity, knowledge retrieval, tool use, guardrails, and observability all in one place without the need to build a complex stack, helping operators and developers build production-level voice agents instantly.
Unlike existing voice stacks that connect STT, LLM, and TTS from separate providers—causing latency and cost issues—Voice Agent Builder maximizes efficiency by using a Speech-to-Speech pipeline tightly coupled with Grok Voice.
Key features include the following:
- Knowledge Base: Upload various document formats so the agent can learn and retrieve business information.
- Tools & Connectors: Perform real actions such as bookings, refund processing, and information lookup through Google Calendar, Outlook, APIs, web search, and X search.
- Custom Voices: Use more than 80 built-in voices, or clone a brand's own unique voice with about 2 minutes of audio.
- Flexible Connectivity: A free phone number is provided, and the platform also supports SIP connections for existing numbers and client connections via WebSocket.
On τ-voice Bench, which measures noise and interruption handling in real call environments as well as multilingual capability, Grok Voice Think Fast 1.0 scored 67.3%, significantly outperforming Gemini 3.1 Flash Live (43.8%) and GPT Realtime 1.5 (35.3%).
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