Sonic 3: Benchmarks, Pricing & Context Window
Sonic 3 is a text-to-speech model from Cartesia, released in October 2025.
Cartesia Sonic-3 with volume, speed, and emotion controls. Supports 42 languages with industry-leading latency.
Input
Text
Output
Audio
Sonic 3 pricing
Providers
Sonic 3 starts at $10.00 per million input tokens via Cartesia.
| Provider | Input $/M | Output $/M | Max Input | Max Output | Latency s | Throughput | Quant | Input | Output |
|---|---|---|---|---|---|---|---|---|---|
 Cartesia | $10.00 | — | 2.5K | — | — | — | — |
Sonic 3 API
POST/v1/tts/synthesize
Modelsonic-3Run a request to see the response
Use it in your code
OpenAI-compatible endpoint through the LLM Stats gateway.
import requests
response = requests.post(
"https://gateway.llm-stats.com/v1/tts/synthesize",
headers={"Authorization": "Bearer YOUR_API_KEY"},
json={
"model_id": "sonic-3",
"text": "Hello, this is a test.",
"format": "mp3",
"sample_rate": 24000,
},
)
with open("output.mp3", "wb") as f:
f.write(response.content)Need an API key? Create one above in the playground, or read the API documentation.
Sonic 3 license
Sonic 3 is released under the Proprietary license, which restricts commercial use.
- License
- Proprietary
- Non-commercial
Proprietary license - usage restrictions apply
FAQ
Common questions about Sonic 3.