Grok Voice API: pricing, features and voices for developers
What the Grok voice API costs per minute, what it supports, how it has changed since launch and how voice cloning works.
The Grok speech-to-speech API (grok-voice-3.0) costs $0.08 per minute. Speech-to-text is $0.10 per hour (batch) or $0.20 (streaming), and text-to-speech is $15 per million characters. It offers 28 built-in voices, function calling, web and X search, and custom voices.
Pricing (October 2026)
| Service | Price |
|---|---|
| Speech-to-speech (grok-voice-3.0) | $0.08 per minute ($4.80 per hour), plus $0.004 per text input event |
| Speech-to-text, batch | $0.10 per hour |
| Speech-to-text, streaming | $0.20 per hour |
| Text-to-speech | $15 per 1 million characters |
From the official developer pricing page, checked October 18, 2026. The voice agent API launched at $0.05 per minute in December 2025; the per-minute price has since risen to $0.08.
Timeline
- Dec 17, 2025: Grok Voice Agent API launches for real-time voice apps.
- May 2026: custom voices (voice cloning) arrive with Grok 4.3, from about a minute of speech plus a spoken consent check.
- Jul 29, 2026: Grok Voice Think Fast 2.0 announced.
- Oct 14, 2026: Grok Voice 3.0 released; it topped Artificial Analysis’s speech-to-speech index at launch.
What the API supports
- A real-time WebSocket endpoint with automatic turn detection or push-to-talk
- Function calling, plus built-in web search, X search and remote MCP tools
- 28 built-in voices; custom voices from a reference clip of up to 120 seconds
- Speech-to-text in 38+ languages; text-to-speech with inline tags such as laughs, whispers and pauses, and phone-line audio output
- Up to 10 concurrent sessions per team and sessions up to 120 minutes
Questions people ask
How much does the Grok voice API cost?
Speech-to-speech is $0.08 per minute as of October 2026, up from $0.05 at launch in December 2025.
Can the Grok API clone voices?
Yes, since May 2026, from a short reference recording with a spoken consent check.
What is the latest Grok voice model?
Grok Voice 3.0, released October 14, 2026.