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Grok Voice 3.0 for founders: Bot voice mode and the $0.08/min API

Grok Voice 3.0 (Oct 14, 2026) powers Grok Bot's voice mode and is available in xAI's Voice Agent API at $0.08/min. Here's what it means for running your business by voice and for phone-based customer service, with xAI's own claims labeled as company-stated.

What you need

• Grok Bot (for voice mode), or an xAI API account (for the Voice Agent API)

Steps

1. What it is: xAI's newest speech-to-speech model, announced Oct 14, 2026. xAI says it powers Grok Bot's voice mode.
2. Independent numbers: per xAI's post, Artificial Analysis ranks it #1 on its Speech-to-Speech Index at 86.9 (vs. 83.2 for GPT-Live-1 Astra Medium and 82.6 for Gemini 3.8 Live), with 97% on Full Duplex Bench, a test of pauses and interruptions. Check Artificial Analysis directly for the latest rankings.
3. Company-stated: xAI says it responds in under one second, handles millions of conversations a day in Tesla vehicles, and that Starlink call centers use Grok Voice to answer 20,000 calls a day, with about 70% resolved with no human and 1 in 4 sales calls ending in a purchase. These are xAI's figures, not independently verified.
4. Use 1, run your day by voice: in Grok Bot's voice mode, ask for your morning brief, triage what needs you, and dictate tasks for your Bots while you drive or walk. Sending, posting, and purchases still wait for your approval.
5. Use 2, hands-free capture: after a meeting, talk through the notes and next steps, then have your Bot turn them into follow-up drafts and to-dos.
6. Use 3, a phone agent (API): the Voice Agent API costs $0.08/min ($4.80/hr), the same as Voice 2.0. Apps using grok-voice-latest switched over automatically. Start with a narrow job, such as hours, bookings, or order status, with a clear handoff to a human.
7. Before you put AI on the phone with customers: script what it can and can't promise, disclose that callers are talking to an AI where the law or good practice requires it, log calls, and review a sample every week.

Prompt to copy

Voice mode: 'Give me my brief for today in under a minute: what needs me first, then my meetings. Then take three tasks from me and assign them to the right Bot. Don't send anything without asking.'

Tips

• The iPhone Action Button can open a Bot directly. See our guide on setting it up.
• API pricing is per minute of conversation. Estimate monthly minutes × $0.08 before you build.
• Benchmarks change quickly. Treat rankings as a snapshot from Oct 13–14, 2026.

FAQ

Sources

• https://x.ai/news/grok-voice-3
• https://artificialanalysis.ai
• https://cursor.com/docs/grok-bot