Boson AI Higgs Audio v3 (Higgs TTS 3 4B / Higgs STT 3)
Model idbosonai/higgs-audio-v3-tts-4b
PricePrice not published
Checked29 September 2026
Where it stands
53newer speech and audio models since its release
- NVIDIA Nemotron 3.5 Transcribe (30B-A4B)28 Oct 2026
- Hy-SimulMT-30B-A3B22 Oct 2026
- Eleven Realtime v1 Max / Mini20 Oct 2026
- Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)20 Oct 2026
- Voxtral Small Transcribe 320 Oct 2026
The 5 newest are listed. All speech and audio models
- Weights
- Weights are public. Licence: Boson Higgs TTS 3 Research and Non-Commercial License. See the licence for commercial terms.
How to call it
3 ways to use Boson AI Higgs Audio v3 (Higgs TTS 3 4B / Higgs STT 3), with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Hugging Face | bosonai/higgs-audio-v3-tts-4b |
huggingface.co | |
| GitHub | github.com | ||
| SGLang-Omni | lmsys.org |
Pricing
Price not published.
No price source linked. Checked 29 September 2026.
Specs
- Input
- Text and audio
- Output
- Audio and text
- Context window
- Not published
- Max output
- Not published
- Open weights
- Yes
- Licence
- Boson Higgs TTS 3 Research and Non-Commercial License (TTS weights; Creator Use Grant for attributed monetized content)
- Released
- 4 June 2026
- Status
- Current
- Type
- Speech and audio
What stands out
What its maker marketed at launch, and what people found later, each with its source.
102-language expressive TTS with zero-shot cloning
~4B AR decoder (24 kHz, 8 codebooks); 85 languages at production quality (WER/CER <5%), 17 usable; inline control of emotion, style, prosody, pauses and sound effects; 8K-token context; sub-second TTFA streaming.
Higgs STT 3 (API)
Speech-to-text model (2026-03-18) for 94 languages; 1.55% WER on LibriSpeech test-clean vs 2.10% for Whisper-large-v3 (company figures). No open weights found.
Notes
TTS weights non-commercial; production/hosted use needs a Boson commercial license or the Boson API (pricing not found). Also mirrored as bosonai/higgs-tts-3-4b. Predecessor Higgs Audio v2 (2025, Apache-2.0-style) on the same GitHub.
Sources: https://huggingface.co/bosonai/higgs-audio-v3-tts-4b , https://www.boson.ai/blog/higgs-audio-v3-tts , https://www.boson.ai/blog/higgs-audio-v3-stt