# Cartesia — Introducing Sonic-3.6

- Company: Cartesia (cartesia.ai)
- Announced: 2026-08-27
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://www.cartesia.ai/blog/sonic-3.6
- Record: https://forck.live/items/8006-introducing-sonic-3-6
- Subject: Sonic / Ink
- Models affected: Sonic-3.6

Cartesia released Sonic-3.6, an updated voice model that improves naturalness and quality, with listeners preferring it over competitors in blind head-to-head tests across multiple languages. The model supports 44 languages, 61 locales, and 500+ preset voices, including new languages Odia and Urdu. It offers sub-90ms latency and is generally available via the API and playground.

## Evidence

Verbatim from https://www.cartesia.ai/blog/sonic-3.6:

> Sonic-3.6 is the culmination of our latest advances in architectures that learn efficiently from multilingual audio across pre- and post-training. Sonic-3.6 makes huge strides compared to Sonic-3.5 in naturalness and quality, with listeners preferring it in up to 93% of blind head-to-head tests across fifteen locales.

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Record: https://forck.live/items/8006-introducing-sonic-3-6
Catalogue: https://forck.live/llms.txt
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