xAI

Grok TTS

grok-tts

Turn text into expressive spoken audio with a single API call.

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.

15K context15K context
Released2026-03-16
Relays2 sites
audiomultimodal

Model information

Model ID
grok-tts
Context
15K
Max input
-
Max output
15K
Knowledge cutoff
-
Open weights
Not supported
License
-
Release date
2026-03-16

Input

Text: SupportedImage: Not supportedAudio: Not supportedVideo: Not supportedPDF: Not supportedFile: Not supported

Output

Text: Not supportedImage: Not supportedAudio: SupportedVideo: Not supported

API capabilities

Reasoning: Not supportedTool call: Not supportedStructured output: UnknownTemperature: Not supported

Relay Comparison

Compare token, per-request, or per-second pricing by relay channel.

How should Grok TTS relay pricing be compared?

This Grok TTS pricing page compares official pricing with public prices from 2 listed AI gateways. Token prices are shown in CNY per 1M tokens, while per-request, per-second, and per-character rows use the unit shown in the table. Last updated: 10/23/2026, 08:15.

Data sources
Public price catalogs, official pricing records, and monitoring results.
Metric definitions
Uptime means successful probe response rate, fake-rate signals possible model mismatch or abnormal output risk, and latency is average API response time.
Risk note
Relay gateways are third-party services. Pricing, billing, privacy, and stability can change; start with a small top-up and verify reliability before continued use.