xAI Launches Grok Voice API With Independent Benchmark Performance

xAI

Jun 15, 2026

xAI launched its Grok Voice API, featuring real-time voice agents, text-to-speech, and speech-to-text capabilities. ServiceNow Research reports the underlying Grok Voice Think Fast 1.0 model reached the Pareto frontier on EVA-Bench, where no evaluated system beats it on accuracy without sacrificing conversational experience. The API is priced at $0.05 per minute for real-time voice conversations.

View the full update on x.ai

xAI

@xai4d ago

Grok Voice offers state-of-the-art performance with human-like timing, tone, and warmth. And it's a fraction the price of competitors. Check it out: https://t.co/R2Wpc3Ig0Z

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