higgs-audio-v3-tts-4b

Higgs Audio v3 TTS

<div align="left" style="display: flex; justify-content: flex-start; margin-top: 10px;"> <a href="https://www.boson.ai/blog/higgs-audio-v3-tts"> <img src="https://img.shields.io/badge/💚-Boson%20Blog-228B22" style="margin-right: 5px;"> </a> </div>

Higgs Audio v3 TTS is built for voice chat: it speaks, not just reads. It turns model responses into expressive conversational speech across 100+ languages, with zero-shot voice cloning and inline control over emotion, style, prosody, pauses, and sound effects.

[!TIP] Released for research and non-commercial use under the Boson Higgs Audio v3 Research and Non-Commercial License. Production, hosted APIs, or revenue-generating use requires a separate commercial license. Prohibited: voice cloning without consent, impersonation, fraud, election deception, biometric surveillance, or any unlawful use.

Higgs autoregressive decoder consumes interleaved text and audio tokens. Audio is encoded by the Higgs Tokenizer into 8 codebooks at 25 fps, staggered via a delay pattern, then mapped to backbone hidden states through a multi-codebook fused embedding. Output codes pass through a multi-codebook fused head, are de-delayed, and decoded back to waveform.

Supported Languages

The model reaches single-digit WER/CER on 102 languages, which split into two tiers.

WER/CER under 5 — polished, production-quality (85)

🇿🇦 Afrikaans · 🇸🇦🇪🇬 Arabic · 🇦🇲 Armenian · 🇮🇳 Assamese · 🇪🇸 Asturian · 🇦🇿 Azerbaijani · 🇷🇺 Bashkir · 🇪🇸 Basque · 🇧🇾 Belarusian · 🇧🇩🇮🇳 Bengali · 🇧🇦 Bosnian · 🇧🇬 Bulgarian · 🇪🇸 Catalan · 🇵🇭 Cebuano · 🇮🇶 Central Kurdish · 🇨🇳 Chinese · 🇭🇷 Croatian · 🇨🇿 Czech · 🇩🇰 Danish · 🇳🇱🇧🇪 Dutch · 🇷🇺 Eastern Mari · 🇺🇸🇬🇧🇦🇺 English · 🌐 Esperanto · 🇪🇪 Estonian · 🇫🇮 Finnish · 🇫🇷🇨🇦 French · 🇪🇸 Galician · 🇬🇪 Georgian · 🇩🇪🇦🇹 German · 🇬🇷 Greek · 🇮🇳 Gujarati · 🇭🇹 Haitian Creole · 🇳🇬 Hausa · 🇮🇱 Hebrew · 🇮🇳 Hindi · 🇭🇺 Hungarian · 🇮🇩 Indonesian · 🇮🇹 Italian · 🇯🇵 Japanese · 🇮🇩 Javanese · 🇮🇳 Kannada · 🇰🇿 Kazakh · 🇰🇷 Korean · 🇷🇼 Kinyarwanda · 🇰🇬 Kyrgyz · 🇱🇻 Latvian · 🇨🇩 Lingala · 🇱🇹 Lithuanian · 🇰🇪 Luo · 🇲🇰 Macedonian · 🇲🇾🇮🇩 Malay · 🇮🇳 Malayalam · 🇲🇹 Maltese · 🇳🇿 Māori · 🇮🇳 Marathi · 🇲🇳 Mongolian · 🇳🇵 Nepali · 🇳🇴 Norwegian · 🇫🇷 Occitan · 🇮🇷🇦🇫 Persian · 🇵🇱 Polish · 🇵🇹🇧🇷 Portuguese · 🇷🇴 Romanian · 🇷🇺 Russian · 🇿🇦 Sepedi · 🇷🇸 Serbian · 🇿🇼 Shona · 🇸🇰 Slovak · 🇸🇮 Slovene · 🇪🇸🇲🇽 Spanish · 🇹🇿🇰🇪 Swahili · 🇸🇪 Swedish · 🇵🇭 Tagalog · 🇹🇯 Tajik · 🇮🇳🇱🇰 Tamil · 🇮🇳 Telugu · 🇹🇭 Thai · 🇹🇷 Turkish · 🇺🇦 Ukrainian · 🇵🇰🇮🇳 Urdu · 🇨🇳 Uyghur · 🇺🇿 Uzbek · 🇻🇳 Vietnamese · 🇿🇦 Xhosa · 🇿🇦 Zulu

WER/CER between 5 and 10 — usable, but less polished (17)

🇦🇱 Albanian · 🇲🇼🇿🇲 Chichewa/Nyanja · 🇮🇳🇵🇰 Eastern Punjabi · 🇺🇬 Ganda · 🇮🇸 Icelandic · 🇮🇪 Irish · 🇩🇿 Kabyle · 🇨🇻 Kabuverdianu · 🇰🇪 Kamba · 🇻🇦 Latin · 🇱🇺 Luxembourgish · 🇪🇹🇰🇪 Oromo · 🇦🇫🇵🇰 Pashto · 🇵🇰🇮🇳 Sindhi · 🇸🇴 Somali · 🇦🇴 Umbundu · 🇬🇧 Welsh

Control Tokens

All tags follow <|category:value|> syntax and can be inserted mid-utterance.

• Emotion — elation, amusement, enthusiasm, determination, pride, contentment, affection, relief, contemplation, confusion, surprise, awe, longing, arousal, anger, fear, disgust, bitterness, sadness, shame, helplessness

<div style="margin-left:1.5em;margin-top:-10px"> <table style="display:inline-table;width:max-content;max-width:none;border-collapse:collapse;font-size:clamp(11px,1.4vw,13px);text-align:left"> <thead><tr> <th style="padding:14px 20px;text-align:left;font-weight:600;border-bottom:2px solid #7BCFA3;color:#7BCFA3">Token</th> <th style="padding:14px 20px;text-align:left;font-weight:500;border-bottom:2px solid #7BCFA3;color:#7BCFA3">Description</th> </tr></thead> <tbody> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:elation|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Elation / joy</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:amusement|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Amusement / playful laughter</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:enthusiasm|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Enthusiasm / excitement</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:determination|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Determination / firmness</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:pride|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Pride / confidence</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:contentment|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Calm satisfaction</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:affection|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Warmth / affection</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:relief|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Relief</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:contemplation|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Thoughtful / reflective</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:confusion|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Confused</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:surprise|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Surprised</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:awe|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Awe / wonder</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:longing|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Longing / yearning</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:arousal|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Heightened desire</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:anger|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Anger</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:fear|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Fear</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:disgust|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Disgust</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:bitterness|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Bitterness</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:sadness|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Sadness</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:shame|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Shame</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|emotion:helplessness|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Helplessness</td></tr> </tbody> </table> </div>

• Style — singing, shouting, whispering

<div style="margin-left:1.5em;margin-top:-10px"> <table style="display:inline-table;width:max-content;max-width:none;border-collapse:collapse;font-size:clamp(11px,1.4vw,13px);text-align:left"> <thead><tr> <th style="padding:14px 20px;text-align:left;font-weight:600;border-bottom:2px solid #7BCFA3;color:#7BCFA3">Token</th> <th style="padding:14px 20px;text-align:left;font-weight:500;border-bottom:2px solid #7BCFA3;color:#7BCFA3">Description</th> </tr></thead> <tbody> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|style:singing|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Singing</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|style:shouting|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Shouting / projected voice</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|style:whispering|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Whisper</td></tr> </tbody> </table> </div>

• Sound effects — cough, laughter, crying, screaming, burping, humming, sigh, sniff, sneeze

<div style="margin-left:1.5em;margin-top:-10px"> <p style="margin:0 0 1px;color:rgba(128,128,128,0.9);font-size:13px;text-align:left">Pair each token with the matching onomatopoeia immediately after it.</p> <table style="display:inline-table;width:max-content;max-width:none;border-collapse:collapse;font-size:clamp(11px,1.4vw,13px);text-align:left"> <thead><tr> <th style="padding:14px 20px;text-align:left;font-weight:600;border-bottom:2px solid #7BCFA3;color:#7BCFA3">Token</th> <th style="padding:14px 20px;text-align:left;font-weight:500;border-bottom:2px solid #7BCFA3;color:#7BCFA3">Description</th> <th style="padding:14px 20px;text-align:left;font-weight:500;border-bottom:2px solid #7BCFA3;color:#7BCFA3">Suggested onomatopoeia</th> </tr></thead> <tbody> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|sfx:cough|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Cough</td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Ahem</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|sfx:laughter|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Laughter</td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Haha / Hehe</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|sfx:crying|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Crying</td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Boohoo / Sob</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|sfx:screaming|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Screaming</td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Ahh / Aaah</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|sfx:burping|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Burping</td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Burp</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|sfx:humming|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Humming</td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Hmm / Mmm</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|sfx:sigh|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Sigh</td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Uh / Ahh</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|sfx:sniff|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Sniff</td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Sff</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|sfx:sneeze|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Sneeze</td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Achoo</td></tr> </tbody> </table> </div>

• Prosody
  • Speed — speed_very_slow, speed_slow, speed_fast, speed_very_fast
  • Pauses — pause, long_pause
  • Pitch — pitch_low, pitch_high
  • Delivery — expressive_high, expressive_low

<div style="margin-left:1.5em;margin-top:-10px"> <table style="display:inline-table;width:max-content;max-width:none;border-collapse:collapse;font-size:clamp(11px,1.4vw,13px);text-align:left"> <thead><tr> <th style="padding:14px 20px;text-align:left;font-weight:600;border-bottom:2px solid #7BCFA3;color:#7BCFA3">Token</th> <th style="padding:14px 20px;text-align:left;font-weight:500;border-bottom:2px solid #7BCFA3;color:#7BCFA3">Effect</th> </tr></thead> <tbody> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:speed_very_slow|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">≈0.65× speed</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:speed_slow|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">≈0.85× speed</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:speed_fast|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">≈1.2× speed</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:speed_very_fast|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">≈1.4× speed</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:pitch_low|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">≈−3 semitones</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:pitch_high|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">≈+2.5 semitones</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:pause|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">≈400–700 ms pause</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:long_pause|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">≈700–1500 ms pause</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:expressive_high|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">More expressive delivery</td></tr> <tr><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)"><code>&lt;|prosody:expressive_low|&gt;</code></td><td style="padding:12px 20px;border-bottom:1px solid rgba(128,128,128,0.15)">Flatter delivery</td></tr> </tbody> </table> </div>

Evaluation Benchmarks

Multilingual Voice Clone

We evaluate Higgs Audio v3 TTS on public multilingual TTS suites and our internal 111-language Higgs-Multilingual set, covering both common and lower-resource languages.

WER / CER (↓, ×100) macro-averaged across each benchmark's language set. Lower is better; bold marks the best per row. All numbers are reproducible end-to-end with original metrics and normalization.

<div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;width:100%;padding:16px 0;overflow-x:auto;-webkit-overflow-scrolling:touch"> <table style="width:100%;border-collapse:collapse;font-size:clamp(11px,1.4vw,13px);text-align:center"> <thead><tr> <th style="padding:18px 24px;text-align:center;font-weight:600;border-bottom:2px solid #16a34a;color:#16a34a">Benchmark</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Higgs Audio v2</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Higgs Audio v3</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Fish Audio S2 Pro</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Qwen3-TTS-1.7B</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">VibeVoice-7B</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">IndexTTS-2</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">MiMo-Audio-7B-Instruct</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">MOSS-TTS-v1.5</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">OmniVoice</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">ChatterBox</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">FireRedTTS-2</th> </tr></thead> <tbody> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">SeedTTS</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">2.10</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">1.11</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">1.31</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">1.30</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">3.59</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">1.63</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">3.70</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">1.73</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">1.21</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">17.00</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">1.72</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">CV3</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">21.19</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">4.41</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">4.60</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">7.73</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">11.66</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">129.26</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">71.55</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">6.11</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">4.92</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">32.62</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">19.20</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">MiniMax-Multilingual</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">49.86</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">2.74</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">5.15</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">27.41</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">8.21</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">112.91</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">85.67</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">3.78</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">2.98</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">49.30</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">12.52</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">Higgs-Multilingual</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">52.24</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">3.61</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">8.68</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">97.09</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">13.74</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">57.71</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">59.61</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">21.28</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">3.63</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">57.52</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">33.69</td> </tr> </tbody> </table> </div>

Emergent TTS

Win-rate (↑) per category — judge preference vs the BASELINE row; bold marks the highest win-rate per column. For a fair comparison, every model shares the same reference audio per prompt, and we run the benchmark text verbatim — no inline control tags inserted.

<div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;width:100%;padding:16px 0;overflow-x:auto;-webkit-overflow-scrolling:touch"> <table style="width:100%;border-collapse:collapse;font-size:clamp(11px,1.4vw,13px);text-align:center"> <thead><tr> <th style="padding:18px 24px;text-align:center;font-weight:600;border-bottom:2px solid #16a34a;color:#16a34a">Model</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Overall ↑</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Emotions ↑</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Foreign Words ↑</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Paralinguistics ↑</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Complex Pronunciation ↑</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Questions ↑</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #16a34a;color:#16a34a;font-size:14px">Syntactic Complexity ↑</th> </tr></thead> <tbody> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">Higgs Audio v3</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">53.65%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">53.75%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">48.75%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">68.57%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">25.10%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">61.43%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">60.71%</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">Fish Audio S2 Pro</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">43.80%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">53.04%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">33.93%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">53.75%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">18.16%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">55.00%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">45.71%</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">Qwen3-TTS-1.7B</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">38.84%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">45.54%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">24.64%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">44.29%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">30.00%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">53.39%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">34.11%</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">IndexTTS-2</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">31.12%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">39.29%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">5.36%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">42.50%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">12.45%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">45.89%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">38.93%</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">MOSS-TTS-v1.5</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">43.89%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">60.54%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">35.18%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">51.43%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">11.63%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">53.21%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">47.32%</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">OmniVoice</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">40.82%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15);font-weight:600">61.07%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">28.75%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">52.68%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">13.67%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">45.00%</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">40.36%</td> </tr> </tbody> </table> </div>

Usage

SGLang Usage

Pair the weights in this repo with SGLang-Omni — a production serving stack with continuous batching for multi-codebook decoding and the same inline tag controls. The Higgs TTS cookbook walks you through installation, server launch, request examples, and the full API reference.

See the Higgs TTS cookbook for the full details.

Install and Serve

docker pull lmsysorg/sglang-omni:dev
docker run -it --gpus all --shm-size 32g --ipc host --network host --privileged \
  lmsysorg/sglang-omni:dev /bin/zsh

git clone [email protected]:sgl-project/sglang-omni.git && cd sglang-omni
uv venv .venv -p 3.12 && source .venv/bin/activate
uv pip install -v -e .

export HF_TOKEN=hf_xxxxxxxxxxxxxxxx
hf download bosonai/higgs-audio-v3-tts-4b

sgl-omni serve \
  --model-path bosonai/higgs-audio-v3-tts-4b \
  --port 8000

Zero-shot synthesis

curl -X POST http://localhost:8000/v1/audio/speech \
  -H "Content-Type: application/json" \
  -d '{"input": "Hello, how are you?"}' \
  --output output.wav

Voice cloning

Supplying the reference transcript (text) materially improves cloning fidelity.

import requests

resp = requests.post(
    "http://localhost:8000/v1/audio/speech",
    json={
        "input": "Have a nice day and enjoy south california sunshine.",
        "references": [{
            "audio_path": "ref.wav",
            "text": "Hey, Adam here. Let's create something that feels real, sounds human, and connects every time.",
        }],
        "temperature": 0.8, "top_k": 50, "max_new_tokens": 1024,
    },
)
with open("output.wav", "wb") as f:
    f.write(resp.content)

Streaming (Server-Sent Events)

Set "stream": true to receive base64-encoded WAV chunks as the vocoder emits them — sub-second time-to-first-audio. Each event carries audio.data (base64 WAV bytes); the terminal event has finish_reason: "stop" plus usage metadata.

import requests, base64, json

with requests.post(
    "http://localhost:8000/v1/audio/speech",
    json={"input": "Get the trust fund to the bank early.", "stream": True},
    stream=True,
) as resp, open("output.wav", "wb") as f:
    for line in resp.iter_lines():
        if not line or not line.startswith(b"data: ") or line == b"data: [DONE]":
            continue
        event = json.loads(line[6:])
        if event.get("finish_reason") == "stop":
            break
        audio = event.get("audio") or {}
        if audio.get("data"):
            f.write(base64.b64decode(audio["data"]))

Inline control tokens

Embed <|emotion:…|>, <|style:…|>, <|prosody:…|>, and <|sfx:…|> tokens directly in input. Two rules:

1. Delivery tokens first. Emotion, style, and the prosody speed / pitch / expressive tokens shape the whole turn — put them at the start of input. Positional tokens (<|prosody:pause|>, <|prosody:long_pause|>, <|sfx:…|>) go inline exactly where they fire.
2. Pair every <|sfx:…|> with its onomatopoeia. E.g. <|sfx:laughter|>Haha, <|sfx:sigh|>Uh, <|sfx:sneeze|>Achoo. The written sound gives the model the acoustic cue to realize the effect.

Example — amusement + laughter:

curl -X POST http://localhost:8000/v1/audio/speech \
  -H "Content-Type: application/json" \
  -d '{"input": "<|emotion:amusement|><|prosody:expressive_high|>Wait, wait, that was kind of hilarious. <|sfx:laughter|>Hehe, no, seriously, I was not ready for that."}' \
  --output output.wav

Throughput

Throughput on Seed-TTS EN (full set, N=1088 per run). Client --max-concurrency sweep against a Higgs server (max_running_requests=16, bf16, CUDA Graph on). Each row is the mean of 3 runs. Hardware: 1× H100.

<div style="font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;width:100%;padding:16px 0;overflow-x:auto;-webkit-overflow-scrolling:touch;text-align:center"> <table style="display:inline-table;width:max-content;max-width:none;border-collapse:collapse;font-size:clamp(11px,1.4vw,13px);text-align:center"> <thead><tr> <th style="padding:18px 24px;text-align:center;font-weight:600;border-bottom:2px solid #ea580c;color:#ea580c">Concurrency</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #ea580c;color:#ea580c;font-size:14px">Throughput (req/s)</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #ea580c;color:#ea580c;font-size:14px">Mean latency</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #ea580c;color:#ea580c;font-size:14px">RTF (per-req)</th> <th style="padding:18px 24px;text-align:center;font-weight:500;white-space:nowrap;border-bottom:2px solid #ea580c;color:#ea580c;font-size:14px">audio_s/s</th> </tr></thead> <tbody> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">1</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">1.62</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">617 ms</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">0.147</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">6.89</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">2</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">2.70</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">742 ms</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">0.180</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">11.37</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">4</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">5.45</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">733 ms</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">0.177</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">22.84</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">8</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">8.91</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">898 ms</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">0.217</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">37.38</td> </tr> <tr> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">16</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">14.74</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">1079 ms</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">0.262</td> <td style="padding:16px 24px;text-align:center;border-bottom:1px solid rgba(128,128,128,0.15)">61.84</td> </tr> </tbody> </table> </div>

• Concurrency — Maximum number of in-flight client requests (--max-concurrency).
• Throughput (req/s) — Completed requests divided by total benchmark wall-clock time.
• Mean latency — Average end-to-end time per request (send to full response received).
• RTF (per-req) — Average ratio of processing time to generated audio duration per request (<1 is faster than real time).
• audio_s/s — Total seconds of audio produced divided by total benchmark wall-clock time.

To reproduce the results, follow the instructions in this script.

API Usage

For zero-ops deployment, use the Boson AI API.

Citation

@misc{bosonai_higgs_audio_tts_v3_2026,
  title  = {Higgs Audio v3 TTS: Conversational Speech for Voice AI from Boson AI},
  author = {Boson AI},
  year   = {2026},
  howpublished = {https://huggingface.co/bosonai/higgs-audio-v3-tts-4b},
}

License

Boson Higgs Audio v3 Research and Non-Commercial License — see LICENSE.