Grok Voice Think Fast 2.0
Model overview
grok-voice-think-fast-2.0
xAI's July 2026 realtime speech-to-speech API model.
speechaudiorealtimeagentvoice assistantrealtime voiceenterprise access
Representative version
grok-voice-think-fast-2.0
| Company | xAI |
|---|---|
| Release | 2026-07-29 |
| Release type | Model release |
| Parameters | Not disclosed |
| Architecture | Not disclosed |
| Context | Not disclosed |
| Input modalities | audio |
| Output modalities | audio |
| Tool use / function calling | Tool use: Not disclosed; Function calling: Not disclosed |
| Structured output / reasoning | Not shown: Structured output |
| Vision / audio / video | Confirmed: Audio; Not shown: Vision, Video |
| Open weights / License | No open weights currently / weight license not disclosed xai-grok-voice-think-fast-2-0-current · License not applicable |
| Vendor API | Available Grok Voice Think Fast 2.0xai-grok-voice-think-fast-2-0-current · 2026-07-29 |
| OpenRouter | Not separately listed on OpenRouter |
| Pricing | Official pricing page |
| Benchmark | No reliable public source |
| Public signals | No reliable public source |
| Use cases | Realtime voice agents / Interactive speech-to-speech applications / voice assistant / realtime voice |
| Claim evidence | Release event / Model specificationsGrok Voice Think Fast 2.0grok-voice-think-fast-2.0 · 2026-07-29 · Grok Voice Think Fast 2.0 · grok-voice-think-fast-2.0 |
OpenRouter
Pricing / context / availability
| OpenRouter | Not separately listed on OpenRouter |
|---|---|
| OpenRouter listing | Not separately listed in the current OpenRouter public list |
| Mapped version | grok-voice-think-fast-2.0 xai-grok-voice-think-fast-2-0-current |
| Pricing | Official pricing page |
| Context | Not disclosed |
| Speed/Latency | No reliable public source |
| Snapshot time | 2026-08-11T06:28:09.895Z |
| Source | View source |
Verified limitations
Usage boundaries
- Closed-source parameters and architecture are not disclosed.
Missing public information
Public information not yet available
Parameter scale not disclosedNot listed on OpenRouterNo reliable benchmark sourceNo public model-card activity countersNo linkable model-specific reviewSpeed/latency not disclosed