# Grok TTS API pricing

XAI GROK / AUDIO

> Grok TTS via one OpenAI-compatible key: $9.45 per 1M characters. Model ID grok-tts, base URL https://api.outrun.to/v1. Prices as of October 30, 2026.

$9.45 per 1M characters

Grok TTS costs $9.45 per 1M characters. Call it with model ID `grok-tts` at `https://api.outrun.to/v1` using one prepaid Outrun key. Prices as of October 30, 2026.

`grok-tts`

USD / 1M CHARACTERS

## How much does Grok TTS cost per 1M characters?

[Get a key ↗](https://outrun.to/overview)

Standard

| Usage | Outrun |
| --- | --- |
| Input | **$9.45** |

Billed prices, rounded up to the cent. Prices as of October 30, 2026.

Billing unit

1M characters

## What is Grok TTS?

Grok TTS is a audio model in the Outrun catalog. The catalog lists $9.45 per 1M characters.

## What are the Grok TTS model details?

| Model detail | Value |
| --- | --- |
| Kind | Audio |

## How do I call Grok TTS?

Endpoint and parameters from the model setup reference. This is the request outline; supply your input as described in the [API reference](https://outrun.to/docs/api).

Request outline

```
POST /v1/audio/speech
model: grok-tts
voice: eve
response_format: mp3
```

## What request parameters does Grok TTS take?

The setup reference lists the endpoint and options below. Follow the [API reference](https://outrun.to/docs/api) for the prompt, file or reference-image fields.

| Request field | Value |
| --- | --- |
| Endpoint | `POST /v1/audio/speech` |
| voice | `eve` |
| response_format | `mp3` |

## How does Grok TTS compare with other audio models?

| Model | Rate |
| --- | --- |
| [Grok TTS](https://outrun.to/model/grok-tts) This model | $9.45 per 1M characters |

## Which similar models can I try?

[Google Gemini Gemini 3 STT $0.32 in / $1.89 out View model ↗](https://outrun.to/model/gemini-3-stt)[Google Gemini Gemini 3.8 Flash TTS $0.32 in / $5.67 out View model ↗](https://outrun.to/model/gemini-3.8-flash-tts)[Google Gemini Gemini 3.1 TTS $0.04 per request View model ↗](https://outrun.to/model/gemini-3.1-tts)

## Common questions about Grok TTS

### How much does the Grok TTS API cost?

Grok TTS costs $9.45 per 1M characters. Prices as of October 30, 2026.

### What model ID and base URL do I use for Grok TTS?

Use the model ID `grok-tts` with the base URL `https://api.outrun.to/v1` and your Outrun API key.

### How is Grok TTS billed?

Per 1M characters, from your prepaid USD balance. There is no subscription.

### Does Outrun store my prompts when I use Grok TTS?

Outrun does not store your prompts, images or outputs unless you choose to save them.

## Where can I find more models?

[xAI Grok guide ↗](https://outrun.to/grok-api)[All model prices ↗](https://outrun.to/discounted-ai-api)[Model docs ↗](https://outrun.to/docs/models)[All model pages ↗](https://outrun.to/model/)

---
Source: https://outrun.to/model/grok-tts
Outrun: https://outrun.to/ | API base: https://api.outrun.to/v1 | Prices (JSON): https://api.outrun.to/pricing | Docs: https://outrun.to/docs/