expressive

Zonos

Apache-2.0

44kHz studio-quality output with emotion control

Zonos from Zyphra generates native 44kHz audio — noticeably crisper than the 22-24kHz most open models produce — with zero-shot cloning from a short reference and explicit control over emotions like happiness, sadness, and anger. It ships in both pure-transformer and SSM-hybrid variants.

Hear Zonos

Zonos · Reference-based · Same three scripts across the directory.

Run it yourself

Best for: 44kHz studio-quality output with emotion control

Permissive model license: This review covers the original transformer checkpoint. Keep notices for the codec, phonemizer and reference audio; hybrid and later checkpoints require distinct checks.

Code: Apache-2.0. Weights: Apache-2.0 (Zonos-v0.1-transformer). License sources checked 2026-09-20. Source 1 Source 2 Source 3

Before you choose: Compare the samples with your own use case. Check the linked documentation for code, weight, and voice license terms.

Details awaiting a fresh review. Hardware figures are estimates unless a benchmark is linked.

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Voices

1 voice

Neutral

Reference-baseddefault

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The scripts

Neutral

“The quick brown fox jumps over the lazy dog near the riverbank.”

Emotional

“I can't believe you actually did it. This is incredible!”

Numbers & Dates

“On March 14th, 2025, the team raised $4.2 million at a 38% margin.”

Run Zonos

git clone https://github.com/Zyphra/Zonos

Sources & setup details

Zonos FAQ

Do I need a GPU to run Zonos?

The directory lists roughly 8 GB of VRAM as a historical estimate. Check the model documentation for your checkpoint and runtime.

Can Zonos clone voices?

Yes — Zonos supports voice cloning from reference audio.

What license is Zonos released under?

Zonos is released under the Apache-2.0 license. Always check the repository for the exact terms — some models license code and weights separately.

What languages does Zonos support?

Zonos supports English, Japanese, Chinese, French, German.

Is there a hosted Zonos API?

OpenSpeech Cloud is accepting production-access interest for Zonos, but this model is not currently hosted in Cloud. Use the official repository for current deployment options.