A.I.
xAI · Grok lab
Voice
Spoken Grok surface: speech-to-speech, speech-to-text, and text-to-speech. Prices below prefer the live docs.x.ai models table (fetched 13 Sep 2026) over marketing shorthand.
- Status
- Current
- Last checked
- 13 Sep 2026newest source date on this page
API family (as published)
| Mode | Published id / notes | Price (docs.x.ai, 13 Sep 2026) |
|---|---|---|
| Speech to Speech | grok-voice-think-fast-2.0 (current STS on pricing) | $0.08/min audio + $0.004 text input |
| Speech to Text | REST / Streaming | $0.10/hr REST, $0.20/hr Streaming |
| Text to Speech | $15.00 / 1M characters | |
| grok-voice-think-fast-1.0 | Marked Deprecated on the models Voice table | Confirm live status on docs |
Reconcile against marketing
x.ai/api’s marketing table has also shown “starting at $0.05/min” for speech-to-speech. That is not the same row as docs.x.ai’s $0.08/min + $0.004 text input. Prefer the models/pricing table when the two disagree, and date the quote.