{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/higgs-audio-v3/","md":"https://postcutoff.com/m/higgs-audio-v3/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"higgs-audio-v3","name":"Boson AI Higgs Audio v3 (Higgs TTS 3 4B / Higgs STT 3)","org":"Boson AI","family":"Higgs Audio","released":"2026-06-04","status":"current","type":"audio/speech","modality_in":["text","audio"],"modality_out":["audio","text"],"open_weights":true,"model_license":"Boson Higgs TTS 3 Research and Non-Commercial License (TTS weights; Creator Use Grant for attributed monetized content)","context_window":null,"max_output":null,"knowledge_cutoff":null,"pricing":null,"price_line":"Price not published","access":[{"provider":"Hugging Face","model_id":"bosonai/higgs-audio-v3-tts-4b","url":"https://huggingface.co/bosonai/higgs-audio-v3-tts-4b"},{"provider":"GitHub","url":"https://github.com/boson-ai/higgs-audio"},{"provider":"SGLang-Omni","docs":"https://www.lmsys.org/blog/2026-06-04-higgs-audio-v3-tts/"}],"capabilities":[{"name":"102-language expressive TTS with zero-shot cloning","detail":"~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.","first":false,"discovered":"launch","source":"https://huggingface.co/bosonai/higgs-audio-v3-tts-4b"},{"name":"Higgs STT 3 (API)","detail":"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.","first":false,"discovered":"launch","source":"https://www.boson.ai/blog/higgs-audio-v3-stt"}],"entry":null,"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.","verified":"2026-09-29","body_md":"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","page_url":"https://postcutoff.com/m/higgs-audio-v3/","standing":{"kind":"speech and audio","newer_count":53,"newer":[{"id":"nemotron-3-5-transcribe","name":"NVIDIA Nemotron 3.5 Transcribe (30B-A4B)","org":"NVIDIA","released":"2026-10-28","page_url":"https://postcutoff.com/m/nemotron-3-5-transcribe/"},{"id":"hy-simulmt-30b-a3b","name":"Hy-SimulMT-30B-A3B","org":"Tencent","released":"2026-10-22","page_url":"https://postcutoff.com/m/hy-simulmt-30b-a3b/"},{"id":"eleven-realtime-v1-max","name":"Eleven Realtime v1 Max / Mini","org":"ElevenLabs","released":"2026-10-20","page_url":"https://postcutoff.com/m/eleven-realtime-v1-max/"},{"id":"voxtral-mini-transcribe-3","name":"Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)","org":"Mistral AI","released":"2026-10-20","page_url":"https://postcutoff.com/m/voxtral-mini-transcribe-3/"},{"id":"voxtral-small-transcribe-3","name":"Voxtral Small Transcribe 3","org":"Mistral AI","released":"2026-10-20","page_url":"https://postcutoff.com/m/voxtral-small-transcribe-3/"}],"before":null,"after":null,"weights":"public","licence":"Boson Higgs TTS 3 Research and Non-Commercial License (TTS weights; Creator Use Grant for attributed monetized content)","licence_permissive":false,"summary":"Weights are public. Licence: Boson Higgs TTS 3 Research and Non-Commercial License. See the licence for commercial terms."}}