> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cartesia.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Older Models

<Note>
  We recommend using [Sonic 3.5](/build-with-cartesia/tts-models/latest) for
  best results, most languages, and naturalness. We continue to serve these
  older models for compatibility.
</Note>

## sonic-3

| Snapshot             | Release Date     | Languages                                                                                                                                                              | Status                              |
| -------------------- | ---------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------- |
| `sonic-3-2026-01-12` | January 12, 2026 | en, de, es, fr, ja, pt, zh, hi, ko, it, nl, pl, ru, sv, tr, tl, bg, ro, ar, cs, el, fi, hr, ms, sk, da, ta, uk, hu, no, vi, bn, th, he, ka, id, te, gu, kn, ml, mr, pa | <Badge color="green">Stable</Badge> |
| `sonic-3-2025-10-27` | October 27, 2025 | en, de, es, fr, ja, pt, zh, hi, ko, it, nl, pl, ru, sv, tr, tl, bg, ro, ar, cs, el, fi, hr, ms, sk, da, ta, uk, hu, no, vi, bn, th, he, ka, id, te, gu, kn, ml, mr, pa | <Badge color="green">Stable</Badge> |

Ready to move to Sonic 3.5? See [Migrating from Sonic 3 to Sonic 3.5](/build-with-cartesia/tts-models/sonic-3-to-sonic-3-5).

## sonic-2

| Snapshot             | Release Date   | Languages                                                  | Status                                |
| -------------------- | -------------- | ---------------------------------------------------------- | ------------------------------------- |
| `sonic-2-2025-06-11` | June 11, 2025  | en, fr, de, es, pt, zh, ja, ko                             | <Badge color="green">Stable</Badge>   |
| `sonic-2-2025-05-08` | May 8, 2025    | en, fr, de, es, pt, zh, ja, ko                             | <Badge color="green">Stable</Badge>   |
| `sonic-2-2025-04-16` | April 16, 2025 | en, fr, de, es, pt, zh, ja, ko                             | <Badge color="green">Stable</Badge>   |
| `sonic-2-2025-03-07` | March 7, 2025  | en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, tr | <Badge color="gray">Sunsetted</Badge> |

Read these pages to learn more about how to use Sonic-2:

* [Best practices](/build-with-cartesia/formatting-text-for-sonic-2/best-practices)
* [Inserting breaks](/build-with-cartesia/formatting-text-for-sonic-2/inserting-breaks-pauses)
* [Spelling text](/build-with-cartesia/formatting-text-for-sonic-2/spelling-out-input-text)

## sonic-turbo

| Snapshot                 | Release Date  | Languages                                                  | Status                                |
| ------------------------ | ------------- | ---------------------------------------------------------- | ------------------------------------- |
| `sonic-turbo-2025-06-04` | June 6, 2025  | en, fr, de, es, pt, zh, ja, hi, ko                         | <Badge color="green">Stable</Badge>   |
| `sonic-turbo-2025-03-07` | March 7, 2025 | en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, tr | <Badge color="gray">Sunsetted</Badge> |

## sonic (sunsetted)

| 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 | <Badge color="gray">Sunsetted</Badge> |
| `sonic-2024-10-19` | October 19, 2024  | en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, tr | <Badge color="gray">Sunsetted</Badge> |

## Deprecated Aliases

The following model aliases are now deprecated. Please use the recommended model names instead:

| Deprecated Alias  | Use Instead |
| ----------------- | ----------- |
| `sonic-3-latest`  | `sonic-3.5` |
| `sonic-3-preview` | `sonic-3`   |
| `sonic-preview`   | `sonic-2`   |