Cartesia
Real-time voice AI company behind Sonic text-to-speech
cartesia.aiSan Francisco, United States
Cartesia is a San Francisco company, started in 2023 out of Stanford research, that builds real-time voice AI on state space model architectures. It offers the Sonic text-to-speech models, the Ink speech-to-text models and a managed voice agent platform through one API.
- Founded
- 2023
- Type
- Private company
- Founders
- Karan Goel, Albert Gu, Arjun Desai and Brandon Yang
- AI lab
Catalogue
All models by Cartesia
8 models · 1–8
| Select models to compare | Model | Released | Context | Input /M | Output /M | Parameters | Type | I/O | Openness |
|---|---|---|---|---|---|---|---|---|---|
| Sonic 3.6Cartesia | August 27, 2026 | — | — | — | — | Audio | text → audio | Closed | |
| Ink 2Cartesia | June 15, 2026 | — | — | — | — | Text | audio → text | Closed | |
| Sonic 3.5Cartesia | June 15, 2026 | — | — | — | — | Audio | text → audio | Closed | |
| Sonic 3Cartesia | October 27, 2025 | — | — | — | — | Audio | text → audio | Closed | |
| Ink WhisperCartesia | June 10, 2025 | — | — | — | — | Text | audio → text | Closed | |
| Sonic 2CartesiaRetired | March 11, 2025 | — | — | — | — | Audio | text → audio | Closed | |
| Sonic TurboCartesiaRetired | March 11, 2025 | — | — | — | — | Audio | text → audio | Closed | |
| SonicCartesiaRetired | May 31, 2024 | — | — | — | — | Audio | text → audio | Closed |