4K
text
audio
Not listed
About this model
Fish Audio S2.1 Pro is a state-of-the-art production-grade neural speech synthesis model optimized for ultra-low latency. With a Time-to-First-Audio (TTFA) as low as ~70-90ms, it is built for live conversational AI and turn-taking dialogue systems. It natively supports 83 languages without separate endpoints, features high-consistency voice cloning from reference audio, and excels at natural prosody for long-form narration.
Input modalities
text
Accepted as model input
Providers
Available routing options for this model through OneInfer.
Text to speech
$15.000 / 1M characters
Routing
OneInfer optimized
Pricing
Current OneInfer pricing for this model.
| Usage | Price |
|---|---|
| Text to speechTTS | $15.000 / 1M characters |
Performance & Benchmarks
Independent evaluations and live cluster operational metrics
We haven’t measured this model yet.
API Guide
- 1
Generate your access token
Use your API key to generate the JWT access token required by the Models API.
- 2
Add the JWT token
Copy the generated JWT token and replace
JWT_TOKENin the example below. - 3
Check your credits
If your balance is too low, before calling the model.
- 4
Run the API example
Choose your preferred language, copy the example, and send your first model request.
curl -X POST https://staging-api.oneinfer.ai/v1/ula/generate-audio \ -H "Authorization: Bearer YOUR_JWT_TOKEN" \ -H "Content-Type: application/json" \ -d '{ "provider": "openrouter", "model": "fishaudio/s2.1-pro", "prompt": "OneInfer makes AI inference simple.", "stream": false, "voice_id": "English_expressive_narrator", "format": "mp3" }'
Community Model Reviews & Ratings
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