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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.

We recommend using Sonic 3.5 for best results, most languages, and naturalness. 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 model
to be discontinued June 1, 2026

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sonic-3

SnapshotRelease DateLanguagesStatus
sonic-3-2026-01-12January 12, 2026en, 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, paStable
sonic-3-2025-10-27October 27, 2025en, 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, paStable
Ready to move to Sonic 3.5? See Migrating from Sonic 3 to Sonic 3.5.

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sonic-2

SnapshotRelease DateLanguagesStatus
sonic-2-2025-06-11June 11, 2025en, fr, de, es, pt, zh, ja, koStable
sonic-2-2025-06-11June 11, 2025 hi, it, nl, pl, ru, sv, trEOL June 1, 2026
sonic-2-2025-05-08May 8, 2025en, fr, de, es, pt, zh, ja, koStable
sonic-2-2025-05-08May 8, 2025 hi, it, nl, pl, ru, sv, trEOL June 1, 2026
sonic-2-2025-04-16April 16, 2025en, fr, de, es, pt, zh, ja, koStable
sonic-2-2025-04-16April 16, 2025 hi, it, nl, pl, ru, sv, trEOL June 1, 2026
sonic-2-2025-03-07March 7, 2025en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, trEOL June 1, 2026
Read these pages to learn more about how to use Sonic-2:

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sonic-turbo

SnapshotRelease DateLanguagesStatus
sonic-turbo-2025-06-04June 6, 2025en, fr, de, es, pt, zh, ja, hi, koStable
sonic-turbo-2025-06-04June 6, 2025 it, nl, pl, ru, sv, trEOL June 1, 2026
sonic-turbo-2025-03-07March 7, 2025en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, trEOL June 1, 2026

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sonic

SnapshotRelease DateLanguagesStatus
sonic-2024-12-12December 12, 2024en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, trEOL June 1, 2026
sonic-2024-10-19October 19, 2024en, fr, de, es, pt, zh, ja, hi, it, ko, nl, pl, ru, sv, trEOL June 1, 2026

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Deprecated Aliases

The following model aliases are now deprecated. Please use the recommended model names instead:
Deprecated AliasUse Instead
sonic-3-previewsonic-3
sonic-previewsonic-2
sonic-english sonic-2024-10-19
sonic-multilingual sonic-2024-10-19