S2 Pro API
Fish Audio's text-to-speech model. Call it on 666 AI with the same API key as every other model. Pay as you go; prices follow the upstream in real time and this page updates hourly.
| Vendor | Fish Audio |
| Type | text-to-speech |
| Price | $20.25 per 1M characters |
| Live test | Passed our live test in the last 7 days |
| Model ID (use this in your request) | fish-audio/s2-pro |
How to call S2 Pro
The API is OpenAI-compatible. Replace YOUR-ENDPOINT with the endpoint shown on your API Key page after you sign up, and YOUR-KEY with your key.
curl https://YOUR-ENDPOINT/v1/audio/speech \
-H "Authorization: Bearer YOUR-KEY" \
-H "Content-Type: application/json" \
-d '{"model": "fish-audio/s2-pro", "input": "Hello from 666 AI", "voice": "alloy"}' \
--output speech.mp3from openai import OpenAI
client = OpenAI(base_url="https://YOUR-ENDPOINT/v1", api_key="YOUR-KEY")
r = client.audio.speech.create(model="fish-audio/s2-pro", voice="alloy", input="Hello from 666 AI")
r.write_to_file("speech.mp3")Similar models — price comparison
| Model | Price |
|---|---|
| S2.1 Pro | $20.25 per 1M characters |
| S2.1 Pro Free | $20.25 per 1M characters |
| Grok Voice TTS 1.0 | $20.25 per 1M characters |
| TTS 1 | $22.27 per 1M characters |
| TTS 1 1106 | $22.27 per 1M characters |
| TTS 1 Hd | $44.55 per 1M characters |
More models from Fish Audio
| Model | Price |
|---|---|
| Drama 3 | $2.7 per 1M characters |
| Transcribe 1 | $0.0081 per audio minute |
| Transcribe 1 Pro | $0.0081 per audio minute |
FAQ
How much does the S2 Pro API cost?
On 666 AI, S2 Pro costs $20.25 per 1M characters. You pay only for what you use — no monthly fee. Prices follow the upstream in real time; this page updates every hour.
Can I use the official OpenAI SDK?
Yes. The API is OpenAI-compatible: in the OpenAI Python or Node.js SDK just change base_url and api_key, and set model to fish-audio/s2-pro.
How do I pay?
Bank card (including Google Pay / Apple Pay), USDT / ETH, or bank wire. Top up once and usage is deducted as you go.