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.
Context
15K
15,000 tokens
Max output
15K
15,000 tokens
Input
—
per 1M tokens
Output
—
per 1M tokens
Providers
2
2 listings
Intelligence
—
Not yet scored
Pricing
USD per 1M tokens · listed by ZenMux
| Token type | Standard |
|---|---|
| Input | — |
| Output | — |
Capabilities
ReasoningNo
Tool callNo
Structured outputUnknown
TemperatureNo
AttachmentsNo
Interleaved reasoningNo
Open weightsNo
ModeratedUnknown
Input
Text
Output
Audio
Benchmarks
Published scores and Design Arena Elo
No published benchmark scores for this model yet.
Rankings
Position on each OneAtlas leaderboard
Providers · 2
2 listings
| Provider | Model ID | Context | Input limit | Output | Input $ | Output $ | Reasoning $ | Cache read | Cache write | Audio in | Audio out | Reasoning | Tools | Structured | Temp. | Updated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Vercel AI Gateway | spacexai/grok-tts | 15K | — | 15K | — | — | — | — | — | — | — | No | No | Unknown | No | Mar 16, 2026 |
 ZenMux | x-ai/grok-voice-tts-1.0 | 15K | — | 15K | — | — | — | — | — | — | — | No | No | Unknown | No | Mar 16, 2026 |