Sonic English: Pricing, Performance & Examples
Sonic English is a text-to-speech model from Cartesia, released in September 2024, with a 3K-token context window, and pricing from $10.00 per 1M input tokens.
Cartesia Sonic English TTS model
Sonic English pricing
Providers
Sonic English starts at $10.00 per million input tokens via Cartesia.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p95 s | Output p5 c/s | Modalities in / out |
|---|---|---|---|---|---|---|---|
 Cartesia | $10.00 | — | — | 2.5K/— | — | — | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.
Sonic English context window
Input and output token limits for Sonic English, plus how it ranks on long-context understanding.
Sonic English API
Run 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-english",
"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 English latency
Sonic English time to first token, sustained output throughput, and failed-request rate from live API traffic over the trailing 7 days.
Sonic English license
Sonic English is a proprietary model available under its provider's product and API terms.
- License
- Proprietary
- Hosted access
Proprietary license - usage restrictions apply
FAQ
Common questions about Sonic English.