Grok Voice TTS 1.0
Summary
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.
Convert text into spoken audio with a single API call. The API supports a rich set of expressive voices, inline speech tags for fine-grained delivery control, and output formats from high-fidelity MP3 to telephony-optimized μ-law.
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | xAI |
|---|---|
| Release date | 31 Jul 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 15K (15,000 tokens) [models.dev] |
| Max output | 15K tokens [models.dev] |
| Input | Text [models.dev] |
| Output | Audio [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | No [models.dev] |
Grok Voice TTS 1.0 API pricing by provider
USD per million tokens. Sorted by input price.
We do not currently track a paid API listing for this model.
Frequently asked questions
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.
Change history
No changes detected since we started tracking this model. We re-check every source daily.