# Grok Voice TTS 1.0

> Grok Voice TTS 1.0 is a proprietary speech model from xAI, released on 31 Jul 2026. It accepts text and generates audio, with a 15K-token context window and up to 15K output tokens per response.

Source page: https://www.aimodel.directory/models/grok-voice-tts-1-0
Last verified: 4 Oct 2026

## Specifications

- **Developer:** xAI
- **Release date:** 31 Jul 2026 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zenmux/models/x-ai/grok-voice-tts-1.0.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zenmux/models/x-ai/grok-voice-tts-1.0.toml)
- **Weights:** Proprietary (API only) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zenmux/models/x-ai/grok-voice-tts-1.0.toml)
- **Context window:** 15K (15,000 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zenmux/models/x-ai/grok-voice-tts-1.0.toml)
- **Max output:** 15K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zenmux/models/x-ai/grok-voice-tts-1.0.toml)
- **Input:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zenmux/models/x-ai/grok-voice-tts-1.0.toml)
- **Output:** Audio (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zenmux/models/x-ai/grok-voice-tts-1.0.toml)
- **Reasoning mode:** No (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zenmux/models/x-ai/grok-voice-tts-1.0.toml)
- **Tool calling:** No (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/zenmux/models/x-ai/grok-voice-tts-1.0.toml)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|

## FAQ

### What is the context window of Grok Voice TTS 1.0?

Grok Voice TTS 1.0 has a context window of 15,000 tokens (15K) and can generate up to 15,000 tokens in a single response, according to models.dev.

### Is Grok Voice TTS 1.0 open source?

No. Grok Voice TTS 1.0 is a proprietary model; xAI has not released its weights.

### When was Grok Voice TTS 1.0 released?

xAI released Grok Voice TTS 1.0 on 31 Jul 2026, according to models.dev.

---
Data licensed CC BY 4.0. Cite as: AI Model Directory, "Grok Voice TTS 1.0", https://www.aimodel.directory/models/grok-voice-tts-1-0