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SpaceXAI: Grok Voice TTS 1.0

x-ai/grok-voice-tts-1.0

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Grok Voice TTS 1.0 is a text-to-speech model from SpaceXAI. It converts text into spoken audio across 20+ languages with automatic language detection, and offers five built-in voices (Eve, Ara, Rex, Sal, Leo) covering a range of tones. Inline speech tags allow control over pauses, emphasis, pitch, speed, and vocal style. Output is available in MP3, WAV, PCM, μ-law, and A-law formats at sample rates from 8 kHz to 48 kHz, with up to 15,000 characters per request.

Modalities

Price

$15/M characters

Context

15K

Released

May 15, 2026

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PlaygroundProvidersPerformanceUptimeBenchmarksAppsActivityFAQ

Playground

Providers

This model is hosted by one provider. OpenRouter forwards every request to it directly — no routing decisions to make.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations. Higher percentages are better — and rank percentile shows where this model lands among all models on OpenRouter.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

Quick Start

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

About SpaceXAI: Grok Voice TTS 1.0

OpenRouter makes SpaceXAI: Grok Voice TTS 1.0 available through a unified, OpenAI-compatible API using the model ID x-ai/grok-voice-tts-1.0. It is served by SpaceXAI.

SpaceXAI: Grok Voice TTS 1.0 accepts text and returns generated speech audio. It has a 15,000-token context window.

On OpenRouter, SpaceXAI: Grok Voice TTS 1.0 costs $15.00/M characters. It was released on May 15, 2026.

More models from SpaceXAI

  • Grok 4.6
  • Grok Imagine Image 2.0
  • Grok STT 1.0

Frequently asked questions

Grok Voice TTS 1.0 is a text-to-speech model from SpaceXAI. It converts text into spoken audio across 20+ languages with automatic language detection, and offers five built-in voices (Eve, Ara, Rex, Sal, Leo) covering a range of tones. Inline speech tags allow control over pauses, emphasis, pitch, speed, and vocal style.

Grok Voice TTS 1.0 costs $15.00/M characters.

Grok Voice TTS 1.0 ships 5 voices. Pass a voice ID in the voice field of a text-to-speech request; the IDs this endpoint accepts are listed with the model in the models API.

Grok Voice TTS 1.0 accepts text as input and returns generated speech audio.

Grok Voice TTS 1.0 was released on May 15, 2026.

$15.00----
100.00%
Uptime (3d)

100.00%

Availability (3d)

99.63%

Availability over the last 3 days

Last 72 hours
Availability 99.63%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.71%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.

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