higgs-tts-3-4b is a 4 billion parameter text-to-speech model that converts written text into speech. It supports tool calling and can be deployed locally or via inference providers. The model is aimed at developers building voice interfaces, accessibility tools, or multilingual audio applications.
In the Voice, TTS & speech space, Higgs Tts 3 4b takes a focused approach. It focuses on generating high-quality natural-sounding speech from text using an open, locally runnable model. Higgs Tts 3 4b is an open-source project aimed at developers. The project is open source (Apache-2.0). Higgs Tts 3 4b is available on the command line and API.
Behind Higgs Tts 3 4b is BosonAI, and the product first shipped in 2026. The project is developed in the open on GitHub with 652 stars and 354 commits in the last 90 days.
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