Grok Voice Think Fast 2.0
xAI · · 21 days after Grok 4.5
Verified
1 of 1 published values traced to a source2 primary sources, 2 archived1 not researched yet
Why this status
Newly added. Sources are not archived and no value has been traced to one yet — run `npm run enrich`.
What these states mean · How records are judged · Has this record changed?
xAI's most capable speech-to-speech voice model at release, served through the Speech to Speech API as grok-voice-think-fast-2.0; grok-voice-latest began routing to it on 2026-08-05.
Details
| Released | July 29, 2026 |
|---|---|
| Company | xAI |
| Family | Grok Voice |
| Lineage | after Grok Voice Think Fast 1.0 |
| Era | Agentic systems |
| Type | Audio |
| Modalities | Not recorded |
| Capabilities | Not recorded |
| Weights | Proprietary |
| Licence | Not applicable — proprietary |
Current information, elsewhere
This record is a historical one: every figure above is traced to a dated primary source. For what is true today — live pricing, current rankings, availability — these are better maintained than anything here could be.
- Current price and providers OpenRouter ↗
- Current benchmark scores Artificial Analysis ↗
Sources
Record status: verified · confidence 90/100 · 2 of 2 primary
Newly added. Sources are not archived and no value has been traced to one yet — run `npm run enrich`.
Primary means published by the organisation that made the model. Verified records require at least one.
Grok Voice family
- Grok STT April 17, 2026
- Grok TTS April 17, 2026
- Grok Voice Think Fast 1.0 April 23, 2026
- Grok Voice Think Fast 2.0 July 29, 2026
- Grok Voice Transcribe 2.0 September 18, 2026
- Grok Voice 3.0 October 14, 2026
What changed from Grok Voice Think Fast 1.0
Compared with the previous release in this series. A field appears only when both records state a value — where one does not, it is listed as uncomparable rather than dropped, because a gap in our research is not a finding about the model.
Not comparable: Capabilities and modalities (not researched on both releases)
Compare Grok Voice Think Fast 2.0 with another model →
See Grok Voice Think Fast 2.0 on the interactive timeline →