Higgs Audio v3 TTS
Boson AI's 4B expressive TTS across 100+ languages with cloning.
About
Higgs Audio v3 (Higgs TTS 3) is Boson AI's text-to-speech model, released June 4, 2026, and available as open weights at bosonai/higgs-audio-v3-tts-4b. The 4B model targets conversational, expressive speech across more than 100 languages, with zero-shot voice cloning and inline emotion, style, and prosody control tags. Third-party benchmarks clock it at roughly 8.8x to 10.1x faster than real time in Q8_0 on a consumer GPU, and audio.cpp added local support in its 0.4 release.
The weights are downloadable and self-hostable via SGLang-Omni or GGUF builds, and Boson offers an OpenAI-compatible hosted API in free preview. Caveat: the model is released under the Boson Higgs Audio v3 Research and Non-Commercial License, so production, hosted, or revenue-generating use requires a separate commercial license.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 97; Trending score 76/100 from researcher assessment.