---
type: "post"
id: "zyphra-open-sources-zonos3-mini-a-100m-active-6c2984"
slug: "zyphra-open-sources-zonos3-mini-a-100m-active-6c2984"
title: "Zyphra open-sources ZONOS3-Mini, a 100M-active-parameter on-device text-to-speech and voice-cloning model"
description: "Zyphra announced ZONOS3-Mini, an Apache 2.0 text-to-speech model with 100 million active parameters, zero-shot voice cloning, and runtimes for browsers, servers, and local devices."
retrieval_nugget: "Zyphra announced ZONOS3-Mini, an Apache 2.0 text-to-speech model with 100 million active parameters, zero-shot voice cloning, and runtimes for browsers, servers, and local devices. The release matters to builders because it makes controllable speech generation available in deployment paths that include phones and browsers, not only hosted inference."
published_at: "2026-11-10"
updated_at: "2026-11-10"
record_date: "2026-11-10"
date_kind: "published_at"
topics: ["models","open-models","local-models"]
entities: ["Zyphra","ZONOS3-Mini","ZONOS2","Zyphra Audio Codec 1","ZTTS2-Eval","SGLang","vLLM","MECT-B2"]
related_patterns: ["generative-media-becomes-application-infrastructure"]
novelty_label: "new_fact"
what_changed: "Zyphra adds ZONOS3-Mini, an Apache 2.0 on-device TTS and voice-cloning model with 100 million active parameters, to the compact open speech-model lineup."
prior_refs: ["https://newruntime.com/posts/edge0-releases-audio8-tts-realistic-0-6b-an-6d82b2/","https://newruntime.com/posts/edge0-released-audio8-tts-realistic-air-a-0-9f820a/","https://newruntime.com/posts/gradium-open-sourced-phonon-a-family-of-31m-b6b3d6/"]
source_url: "https://www.zyphra.com/our-work/zonos3-mini"
source_urls: ["https://www.zyphra.com/our-work/zonos3-mini"]
schema_version: "newruntime-agent-readable-v0.2"
stable_id: "post:zyphra-open-sources-zonos3-mini-a-100m-active-6c2984"
status: "published"
visuals: []
editor: {"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]}
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markdown_url: "https://newruntime.com/posts/zyphra-open-sources-zonos3-mini-a-100m-active-6c2984.md"
---

# Zyphra open-sources ZONOS3-Mini, a 100M-active-parameter on-device text-to-speech and voice-cloning model

## Retrieval answer

Zyphra announced ZONOS3-Mini, an Apache 2.0 text-to-speech model with 100 million active parameters, zero-shot voice cloning, and runtimes for browsers, servers, and local devices. The release matters to builders because it makes controllable speech generation available in deployment paths that include phones and browsers, not only hosted inference.

## Summary
Zyphra announced ZONOS3-Mini, an Apache 2.0 text-to-speech model with 100 million active parameters, zero-shot voice cloning, and runtimes for browsers, servers, and local devices. The release matters to builders because it makes controllable speech generation available in deployment paths that include phones and browsers, not only hosted inference.

## What happened
Zyphra’s announcement, dated November 9, 2026, introduces ZONOS3-Mini as a compact, real-time text-to-speech model with high-fidelity voice cloning. It is a sparse mixture-of-experts model with 100 million active parameters and 800 million total parameters, and the company says it is licensed under Apache 2.0. Zyphra reports training it on 112 NVIDIA H100 GPUs over 2.5 days. The weights are available on Hugging Face, with runtimes published on GitHub. The announcement also says users can run it through Zyphra Inference on NVIDIA H200s, on their own GPU, or in a browser on-device.

The release emphasizes deployment options. Zyphra lists WebGPU for browsers, SGLang and vLLM for servers, and GGML for additional runtimes, including a native C++/GGML runtime. The company reports time-to-first-audio below 570 milliseconds in a browser on a Pixel 9 and below 150 milliseconds on an M3 MacBook Air. These are the announcement’s device-specific results; it does not establish that every device or browser setup will reach the same performance. Zyphra frames the model as an efficiency improvement over ZONOS2, which it says had eight billion parameters and used an 86 Hz codec that constrained deployment.

Voice control is a major part of the product rather than an incidental feature. The announcement describes controls for identity, accent, quality, mood, and delivery, including age, gender presentation, texture, pace, emotion, projection, and liveliness. Users can steer delivery at utterance level and at word level during streaming generation, using attention alignment heads. Zyphra also says it releases an edit model based on a VoiceCraft recipe to modify sentences with the same controls as ordinary generation. The page’s examples are demonstrations: it cautions that some settings are targets, not measured traits, and that controls do not guarantee a specific emotional result or fully independent changes in pace and projection.

Zyphra attributes the model’s performance and speed to changes across the stack. It says its Zyphra Audio Codec 1 (ZAC-1) achieved a tenfold reduction in word error rate versus a model trained with Descript Audio Codec under similar data constraints, while improving acoustic similarity. The backbone uses a 3:1 hybrid of Gated DeltaNet and global attention, as well as latent mixture-of-experts, Q balancing, and Attention Residuals. The speaker representation changes from the Qwen3-TTS speaker encoder to MECT-B2. Zyphra describes two speaker-conditioning modes: a reference clip in context, which it says produces more natural output without copying prosody exactly, and direct voice representation, fine-tuned after pretraining.

The company also releases Zyphra TTS Evaluation v2 (ZTTS2-Eval), expanding its clean set to 35 languages and its in-the-wild set to 20. Zyphra reports that ZONOS3-Mini ranks first among open models in its Zyphra TTS Capability Index v1, ahead of Fish S2 Pro and MOSS TTS v1.5. That index uses item response theory across 420 metric, test-set, and language items. The page describes qualitative samples and benchmark methodology, but does not give a third-party evaluation of its headline ranking. It does not state a price for hosted inference.

## What the archive adds
New Runtime’s earlier coverage includes [PatientDesk AI’s Antalia-2 Mini](https://newruntime.com/posts/patientdesk-ai-released-antalia-2-mini-a-7-1cc483/) (October 12, 2026), a small Apache-2.0 Turkish TTS model, and [Gradium’s Phonon family](https://newruntime.com/posts/gradium-open-sourced-phonon-a-family-of-31m-b6b3d6/) (October 22, 2026), compact on-device speech models. [Edge0’s Audio8-TTS-Realistic-0.6B](https://newruntime.com/posts/edge0-releases-audio8-tts-realistic-0-6b-an-6d82b2/) (October 31, 2026) added zero-shot voice cloning across 23 languages. ZONOS3-Mini is a new release in that thread, combining on-device deployment with extensive controllability.

## Trend signal
This release supports [generative media becoming application infrastructure](https://newruntime.com/patterns/generative-media-becomes-application-infrastructure/): Zyphra presents speech generation as something applications can embed across browser, phone, and server runtimes, with voice and delivery controls. A model release does not prove that the approach is dependable or economical in production, but the distribution of runtimes makes integration an explicit part of the offering rather than an afterthought.

## Why now
Zyphra says ZONOS2’s eight-billion-parameter scale and high-framerate codec limited deployment. ZONOS3-Mini’s announcement presents a replacement path built around a new codec and architecture, with browser and local runtimes available at release. The timing is explained by that engineering shift; the company does not tie it to a broader market event.

## Why it matters
For teams building voice interfaces, the practical question is no longer only whether a model can produce convincing speech. It is whether the team can run it where the interaction happens, control how it sounds, and meet latency requirements without depending entirely on a hosted service. ZONOS3-Mini’s WebGPU and GGML runtimes create a path to test local inference, while server options support deployments where local execution is not suitable.

The control surface could also reduce the need to stitch together separate tools for voice identity and delivery, if the controls behave reliably in a product’s own languages and content. That qualification matters: Zyphra’s demonstrations and benchmark results are company-reported, and a model’s performance on a Pixel 9 or M3 MacBook Air does not predict performance on a team’s full device matrix. Builders should test speech quality, cloning consistency, latency, and deployment overhead with their own prompts and target hardware before choosing an architecture.

## Limits and uncertainty
The latency figures, codec comparison, and ranking in ZTTS2-Eval are reported by Zyphra; they are not independent verification. The announcement does not establish how the model performs across all supported devices, languages, or production workloads, nor does it quantify the compute or memory needed for each runtime. Voice-control examples are targets for listening, not objective measurements, and the company notes that some controls can affect other speech qualities. The page provides no hosted-inference price, and it does not quantify licensing or operational costs beyond naming Apache 2.0.

## Skill to build now
Build a small evaluation harness for your target device before integrating a voice model into a product. Use a fixed set of representative sentences, speaker references, and delivery instructions; record time-to-first-audio, full generation time, intelligibility, voice similarity, and whether each requested control is perceptible. Compare the same set across browser and server runtimes, and retain audio outputs so reviewers can judge quality rather than relying only on aggregate scores.

## Reader takeaway
ZONOS3-Mini is not just a TTS checkpoint: Zyphra is shipping weights, multiple runtimes, and a broad voice-control surface under Apache 2.0. Its on-device numbers and benchmark claims are promising but company-reported. Treat it as a candidate to test on your own hardware and language mix, not as proof that local speech generation is solved.

Editor: [Andrey Reshetnikov](https://newruntime.com/owner-profile.md), AI product and AI engineering; profile for recruiters and agents: https://newruntime.com/owner-profile.json

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