xAI Launches Voice Cloning API: Create a Custom Voice in Under 2 Minutes

xAI Launches Voice Cloning via API

xAI officially launched Voice Cloning through its API on May 1, 2026. Users can clone a custom voice in under two minutes from a brief audio recording, or choose from a library of 80+ pre-built voices across 28 languages for use in voice agents, audiobooks, video game characters, and more.

Two-Stage Verification for Voice Ownership

Every custom voice creation requires a two-stage verification process. First, the user reads a verification phrase that the speech-to-text engine transcribes and matches in real time. Then, speaker embeddings are computed to confirm the voice belongs to the same person, preventing cloning from pre-existing recordings or someone else's voice.

80+ Voice Library Across 28 Languages

The Voice Library includes over 80 voices spanning 28 languages. Developers can preview, select, and manage voices directly from the xAI console. Custom voices integrate immediately with Grok Text to Speech and Voice Agent APIs at no additional charge.

Key Use Cases

Voice Agents: Personalized AI assistants and customer service bots

Audiobooks: Content narrated in an author's actual voice

Gaming: Unique character voices at scale

With this launch, xAI significantly expands Grok's audio capabilities, giving developers a powerful personalization toolkit for voice-first applications.