Models
Cartesia provides a family of state-of-the-art models, including our highly-accurate, low-latency Sonic TTS model family.
- ● the latest stable snapshot of the model
To use the stable version of the model, we recommend using the base model name (e.g. sonic-2
).
In many cases the stable and preview snapshots are the same, but in some cases the preview snapshot may have additional features or improvements.
sonic-2
Sonic-2 is our most capable text to speech model. It provides ultra-realistic speech with accurate transcript following, minimal hallucinations, and best in class voice cloning. It’s latency optimized and achieves 90ms model latency.
Additional Capabilities:
- Higher fidelity voice cloning
- Timestamps for all 15 languages
- Infill support
Note: For versions after sonic-2-2025-03-07
, _experimental_controls
is not supported.
If the latest model does not meet your needs, and you would like to use the controls, please make requests to sonic-2-2025-03-07
.
To learn how to use the Sonic TTS family, see Make an API request.
sonic-turbo
All the power of Sonic, with half the latency (as low as 40ms).
sonic
The first version of our flagship text-to-speech model. It produces high-accuracy, expressive speech, and is optimized for efficiency to achieve low latency.
Selecting a Model
When making API calls, you can specify either:
Continuous updates
All models have a base model name (e.g. sonic-2
, sonic-turbo
, sonic
).
We recommend using these for prototyping and development, then switching to a date-versioned model for production use cases to ensure stability.
Language Support
- English (
en
) - French (
fr
) - German (
de
) - Spanish (
es
) - Portuguese (
pt
) - Chinese (
zh
) - Japanese (
ja
) - Hindi (
hi
) - Italian (
it
) - Korean (
ko
) - Dutch (
nl
) - Polish (
pl
) - Russian (
ru
) - Swedish (
sv
) - Turkish (
tr
)
Future Updates
New snapshots are released periodically with improvements in performance, additional language support, and new capabilities. Check back regularly for updates.
Deprecated and Preview Model Aliases
The following model aliases are now deprecated. Please use the recommended model names instead:
We recommend updating your integrations to use the current model names for the best performance and support.