Grok Voice Models by xAI
xAIProprietary
1 model2026
Capabilities
MultimodalAll models
ReasoningAll models
Function CallingAll models
Tool UseAll models
Structured OutputsAll models
Links
WebsiteAbout
xAI's Grok Voice family of full-duplex voice agent models for enterprise workflows. Designed for complex, multi-step customer support, sales, and enterprise applications with real-time reasoning, structured data capture, and broad language support. The family is evaluated on the τ-voice Bench leaderboard for full-duplex voice agents under realistic conditions.
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
1 in view
Grok Voice Think Fast 1.0Current
Use when the workload needs realtime voice, reasoning, and tool use.
2026-04realtime voicereasoningtool use
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Grok Voice Think Fast 1.0 | Use when the workload needs realtime voice, reasoning, and tool use. | 2026-04 | realtime voicereasoningtool use | Current |
Release Timeline
1 release group2026-04
1 current
Grok Voice Think Fast 1.0
Currentrealtime voicereasoningtool use
Specifications(1 models)
| Model | Released | Multimodal | Reasoning | Fn Calling | Tool Use | Structured Outputs |
|---|---|---|---|---|---|---|
| Grok Voice Think Fast 1.0 | 2026-04 | Yes | Yes | Yes | Yes | Yes |
Frequently Asked Questions
- What is Grok Voice used for?
- Grok Voice is used for realtime voice, vision and multimodal work, and reasoning. The family description and listed model capabilities point to those workloads as the best fit.
- How does Grok Voice compare to Grok 1?
- Grok Voice by xAI is strongest where you need realtime voice, while Grok 1 by xAI is the closest related family to check for reasoning. Grok Voice has 1 listed variant, so compare the specs and pricing tables before choosing a production model.
- Which Grok Voice model should I use?
- If price is the main constraint, use the pricing table first because Grok Voice does not have complete provider pricing in the local data. For the most capable/latest local choice, evaluate Grok Voice Think Fast 1.0 with reasoning, tool use, function calling, structured outputs, and multimodal inputs.
