# Nari Labs Releases Dia2-2B, an Open Voice Cloning Model

> The 2-billion-parameter text-to-speech model can clone voices from a short audio sample and is available under an Apache 2.0 license.

Published by The Open Weights on Nov 15, 2025. Canonical: https://theopenweights.com/news/dia2-2b-qszq

## Key facts

- Company: Nari Labs
- Model: Dia2-2B
- Version: 2
- Category: Text → Speech
- Modalities: Text → Speech
- License: Apache 2.0 (Open weights, commercial use allowed)
- Parameters: 2B
- Precision: FP32
- Weights size: 7.7 GB
- Languages: English
- Significance: notable
- Published: 2025-11-15
- Last verified: 2026-06-17
- Hugging Face: https://huggingface.co/nari-labs/Dia2-2B
- Canonical URL: https://theopenweights.com/news/dia2-2b-qszq

Nari Labs has introduced Dia2-2B, a powerful new open-source model for text-to-speech (TTS) applications. The 2-billion-parameter model is designed for high-fidelity audio generation and is released under the permissive Apache 2.0 license, allowing for broad commercial and research use.

The model's primary capability is zero-shot voice cloning. It can analyze a brief audio sample to capture the unique acoustic properties of a speaker—including timbre, rhythm, and prosody—and then generate new speech in that voice from any given text. This allows for the creation of dynamic, custom voice outputs without needing to train a new model for each speaker.

## Technical Foundations

Dia2-2B is a diffusion-based model, a technique known for producing high-quality generative results. It was trained on a substantial dataset of over 200,000 hours of English speech sourced from public domain audiobooks. While building on foundational concepts from the Bark model, Dia2 features a distinct architecture and was trained on a completely new dataset.

This release provides developers with a strong, openly available tool for creating sophisticated audio applications. As an alternative to proprietary TTS and voice cloning APIs, Dia2-2B enables a new class of customizable products, from personalized digital assistants to dynamic content creation tools. The model is available for download and use from the [Nari Labs Hugging Face repository](https://huggingface.co/nari-labs/Dia2-2B).

## Get the model

- [Hugging Face](https://huggingface.co/nari-labs/Dia2-2B)

## Sources

- [nari-labs/Dia2-2B](https://huggingface.co/nari-labs/Dia2-2B) — Hugging Face, Nov 15, 2025

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Source: The Open Weights (https://theopenweights.com/). Aggregated and written by Claude, curated by humans. Cite as: "Nari Labs Releases Dia2-2B, an Open Voice Cloning Model", The Open Weights, Nov 15, 2025, https://theopenweights.com/news/dia2-2b-qszq