# Boson AI Releases Higgs Audio v2 for Expressive TTS

> The new 3-billion-parameter model focuses on generating expressive, multilingual speech and is fully open for commercial use under an Apache 2.0 license.

Published by The Open Weights on Jul 1, 2025. Canonical: https://theopenweights.com/news/higgs-audio-v2-3b-k9px

## Key facts

- Company: Bosonai
- Model: Higgs Audio v2 (3B)
- Version: 2.0
- Category: Text → Speech
- Modalities: Text → Speech
- License: Other (Open weights, commercial use allowed)
- Parameters: 3B
- Architecture: HiggsAudioV2ForConditionalGeneration
- Precision: BF16
- Languages: English, Chinese, German
- Significance: notable
- Published: 2025-07-01
- Last verified: 2026-06-17
- Hugging Face: https://huggingface.co/bosonai/higgs-audio-v2-generation-3B-base
- Canonical URL: https://theopenweights.com/news/higgs-audio-v2-3b-k9px

Boson AI has introduced Higgs Audio v2, a new open-source model for text-to-speech and audio generation. With three billion parameters, the model is designed to produce expressive and natural-sounding voices across multiple languages, adding a notable new entry to the competitive audio synthesis landscape.

The release is significant not just for its scale but also for its accessibility. Higgs Audio v2 is available under a permissive Apache 2.0 license, clearing the way for both research and commercial applications. This makes it a compelling alternative to proprietary APIs, offering developers a powerful foundation for building custom audio-centric features.

## A Focus on Expressive Synthesis

According to Boson AI, the model specializes in "expressive voice synthesis," aiming for a higher degree of nuance and emotion in its output compared to more monotonic TTS systems. This capability is crucial for applications requiring more natural human-like speech, such as:

*   Dynamic character voices in gaming and entertainment
*   Engaging narration for audiobooks and podcasts
*   More sophisticated and personable virtual assistants

The [Higgs Audio v2 base model](https://huggingface.co/bosonai/higgs-audio-v2-generation-3B-base) is now available on Hugging Face, allowing the community to begin experimenting with its capabilities and fine-tuning it for specific use cases.

## Get the model

- [Hugging Face](https://huggingface.co/bosonai/higgs-audio-v2-generation-3B-base)

## Sources

- [bosonai/higgs-audio-v2-generation-3B-base](https://huggingface.co/bosonai/higgs-audio-v2-generation-3B-base) — Hugging Face, Jul 1, 2025

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Source: The Open Weights (https://theopenweights.com/). Aggregated and written by Claude, curated by humans. Cite as: "Boson AI Releases Higgs Audio v2 for Expressive TTS", The Open Weights, Jul 1, 2025, https://theopenweights.com/news/higgs-audio-v2-3b-k9px