# OpenBMB Releases VoxCPM for Open Voice Synthesis

> The new 500-million-parameter model offers high-quality text-to-speech and zero-shot voice cloning under a permissive license.

Published by The Open Weights on Sep 16, 2025. Canonical: https://theopenweights.com/news/voxcpm-0-5b-32pa

## Key facts

- Company: OpenBMB
- Model: VoxCPM-0.5B
- Version: 0.5B
- Category: Text → Speech
- Modalities: Text → Speech
- License: Apache 2.0 (Open weights, commercial use allowed)
- Parameters: 500M
- Languages: English, Chinese
- Significance: notable
- Published: 2025-09-16
- Last verified: 2026-06-17
- Hugging Face: https://huggingface.co/openbmb/VoxCPM-0.5B
- Canonical URL: https://theopenweights.com/news/voxcpm-0-5b-32pa

The OpenBMB research collective has released VoxCPM-0.5B, a new open-source model for speech generation. At just 500 million parameters, it's designed to be a relatively lightweight yet capable tool for developers working with synthetic audio. The model is available under a permissive Apache 2.0 license, encouraging broad adoption.

VoxCPM is built upon the architecture of the MiniCPM model family, specifically drawing from the multimodal capabilities of MiniCPM4. By extending this foundation into the audio domain, OpenBMB provides a high-quality speech synthesis model that is both accessible and efficient, continuing the trend of powerful, specialized open models in smaller weight classes.

## Zero-Shot Voice Cloning

The model's primary strength lies in its ability to perform zero-shot voice cloning. This means it can replicate a person's voice from a short audio sample without requiring any specialized fine-tuning or retraining. Its core features include:

*   Bilingual text-to-speech in English and Chinese.
*   Zero-shot voice cloning from brief audio clips.
*   High-quality, natural-sounding audio output.

For researchers and developers interested in exploring its capabilities, [the model is available for download on Hugging Face](https://huggingface.co/openbmb/VoxCPM-0.5B). Its open license and modest size make it a compelling option for projects requiring custom voice generation or real-time speech synthesis applications.

## Get the model

- [Hugging Face](https://huggingface.co/openbmb/VoxCPM-0.5B)

## Sources

- [openbmb/VoxCPM-0.5B](https://huggingface.co/openbmb/VoxCPM-0.5B) — Hugging Face, Sep 16, 2025

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Source: The Open Weights (https://theopenweights.com/). Aggregated and written by Claude, curated by humans. Cite as: "OpenBMB Releases VoxCPM for Open Voice Synthesis", The Open Weights, Sep 16, 2025, https://theopenweights.com/news/voxcpm-0-5b-32pa