We recommend using Sonic 3 for best
results, most languages, and controllability. We continue to serve these older
models for compatibility.
Some models and snapshots are being discontinued on June 1, 2026 — see API Changes for details.
the latest stable snapshot of the modelAll models have a base model name (e.g.
to be discontinued June 1, 2026
sonic-2, sonic-turbo) and date-versioned model names
(e.g. sonic-2-2025-06-11).
We recommend using base model names for prototyping and development, then switching to a date-versioned model for production use cases to ensure stability.
When making API calls, you can specify either:
sonic-2
Sonic-2 provides ultra-realistic speech with accurate transcript following, minimal hallucinations, and excellent voice cloning. It’s latency optimized and achieves 90ms model latency.
Additional Capabilities:
- Higher fidelity voice cloning
- Timestamps for all 15 languages
- Infill support
| Snapshot | Release Date | Languages | Status |
|---|---|---|---|
sonic-2-2025-06-11 | June 11, 2025 | en, fr, de, es, pt, zh, ja, ko | Stable |
sonic-2-2025-06-11 | June 11, 2025 | hi, it, nl, pl, ru, sv, tr | EOL June 1, 2026 |
sonic-2-2025-05-08 | May 8, 2025 | en, fr, de, es, pt, zh, ja, ko | Stable |
sonic-2-2025-05-08 | May 8, 2025 | hi, it, nl, pl, ru, sv, tr | EOL June 1, 2026 |
sonic-2-2025-04-16 | April 16, 2025 | en, fr, de, es, pt, zh, ja, ko | Stable |
sonic-2-2025-04-16 | April 16, 2025 | hi, it, nl, pl, ru, sv, tr | EOL June 1, 2026 |
sonic-2-2025-03-07 | March 7, 2025 | en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, tr | EOL June 1, 2026 |
sonic-turbo
All the power of Sonic, with half the latency (as low as 40ms).
| Snapshot | Release Date | Languages | Status |
|---|---|---|---|
sonic-turbo-2025-06-04 | June 6, 2025 | en, fr, de, es, pt, zh, ja, hi, ko | Stable |
sonic-turbo-2025-06-04 | June 6, 2025 | it, nl, pl, ru, sv, tr | EOL June 1, 2026 |
sonic-turbo-2025-03-07 | March 7, 2025 | en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, tr | EOL June 1, 2026 |
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.
| Snapshot | Release Date | Languages | Status |
|---|---|---|---|
sonic-2024-12-12 | December 12, 2024 | en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, tr | EOL June 1, 2026 |
sonic-2024-10-19 | October 19, 2024 | en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, tr | EOL June 1, 2026 |
Deprecated and Preview Model Aliases
The following model aliases are now deprecated. Please use the recommended model names instead:| Deprecated Alias | Use Instead |
|---|---|
sonic-3-preview | sonic-3 |
sonic-preview | sonic-2 |
sonic-english | sonic-2024-10-19 |
sonic-multilingual | sonic-2024-10-19 |