# Also in this release: Cartesia defaults to Sonic 3.6

> Agno's CartesiaTools now sends sonic-3.6 as its default model_id, ahead of Cartesia retiring the sonic-2 snapshots on October 20, 2026.

- Published: 2026-10-20
- Author: jiangjiang248
- Categories: Changelog
- Canonical: https://www.agno.com/blog/also-in-this-release-cartesia-defaults-to-sonic-3-6
- Markdown: https://www.agno.com/blog/also-in-this-release-cartesia-defaults-to-sonic-3-6.md

Agno's `CartesiaTools` now defaults to `sonic-3.6`, ahead of Cartesia retiring `sonic-2` on October 20, 2026, and a `model_id` you pass still reaches Cartesia as written.

Learn more about [CartesiaTools](https://docs.agno.com/tools/toolkits/others/cartesia) in the documentation.