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Grok's Text to Speech API is now available. Start building with natural voices and expressive controls to bring your apps to life. https://t.co/SMxWTB9m6N https://t.co/UtHT0uN148
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View on XxAI Launches Grok Text to Speech API with Five Natural Voices
xAI· Updated
Grok's Text to Speech API is now available for developers, with five voices and expressive controls over pitch, pacing, laughter, and tone. Priced at $4.20 per million characters, the API is built for telephony and web.
xAI launched its Text to Speech API, converting text to natural speech in five voices: Eve, Ara, Leo, Rex, and Sal. The API supports multiple audio formats and expressive controls — tagged speech features for pauses, laughter, whispers, pitch, speed, and emphasis. Pricing is $4.20 per million characters (600 rpm, 10 rps). The TTS API is in beta and joins xAI's Voice Agent API ($0.05/min, WebSocket, MCP support) and Speech to Text on the same platform.
This gives developers a single voice platform — text-to-speech, speech-to-text, and conversational agents — under one xAI API key. The inline tagging system lets you shape how a voice sounds in the text itself.
Add natural speech to any user-facing surface in your app by pointing the TTS endpoint at your content and using tagged controls to tune the voice's tone to context.
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