{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2026-08-25-breeze-tts-2/","md":"https://postcutoff.com/e/2026-08-25-breeze-tts-2/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":"2026-08-25-breeze-tts-2","date":"2026-08-25","date_precision":"day","short_title":"BreezeBlue releases Breeze TTS 2, the new top open-weights text-to-speech model","deck":null,"takeaway":"On 2026-08-25 BreezeBlue published weights and inference code for Breeze TTS 2, a 3B text-to-speech model with voice cloning, voice design and voice direction and under-40 ms time-to-first-audio on an H100.","category":"open-source","category_label":"Open source","importance":3,"confidence":"medium","status":{"key":"partly","labels":["Partly confirmed"]},"sources":[{"n":1,"title":"Hugging Face: BreezeBlue/Breeze-TTS-2","url":"https://huggingface.co/BreezeBlue/Breeze-TTS-2","type":"code","group":"primary","domain":"huggingface.co"},{"n":2,"title":"GitHub: breezeblue-ai/breeze-tts","url":"https://github.com/breezeblue-ai/breeze-tts","type":"code","group":"primary","domain":"github.com"},{"n":3,"title":"Artificial Analysis open-weights TTS leaderboard","url":"https://artificialanalysis.ai/text-to-speech/leaderboard/provider-voice/open-weights","type":"official","group":"primary","domain":"artificialanalysis.ai"},{"n":4,"title":"Artificial Analysis on X: Breeze TTS 2 leads open-weights TTS","url":"https://x.com/ArtificialAnlys/status/2092399623839326550","type":"discussion","group":"reactions","domain":"x.com"}],"official":3,"filed":"2026-09-29","updated":"2026-09-29","orgs":["BreezeBlue"],"title":"BreezeBlue releases Breeze TTS 2, the new top open-weights text-to-speech model","summary":"On 2026-08-25 BreezeBlue published weights and inference code for Breeze TTS 2, a 3B text-to-speech model with voice cloning, voice design and voice direction and under-40 ms time-to-first-audio on an H100. It became the highest-rated open-weights model on the Artificial Analysis Speech Arena (~1,206-1,215 Elo, about 90 points above Fish Audio S2 Pro), though its weights are licensed for research/non-commercial use only.","key_facts":["3B params; cloning, text-described voice design, voice direction, vocal events in one checkpoint","TTFA <40 ms on H100 (fast path), streaming RTF 0.32; needs 12-24 GB VRAM","Artificial Analysis: #1 open weights, ~#6 overall at launch; open-weights top 5 in late Sept 2026: Breeze TTS 2, Fish Audio S2 Pro, Step Audio EditX, Voxtral TTS, Kokoro 82M","Weights: BreezeBlue Research and Non-Commercial License; code Apache-2.0; commercial use via breezeblue.ai subscription","Model card lists English + Chinese; AA post cites 50 languages (unresolved)"],"key_numbers":[],"tags":["tts","speech","voice-cloning","open-weights","voice"],"science":null,"body_md":"## What happened\n\nBreezeBlue, a lab little known before this release, opened the weights of Breeze TTS 2 on Hugging Face and GitHub. A single 3B checkpoint does zero-shot cloning, voice design from a prompt, emotional/tonal direction, and real-time bilingual streaming.\n\n## Why it matters\n\nIt pushed the open-weights ceiling in TTS about 90 Elo higher, narrowing the gap to closed leaders (Eleven v4, Cartesia Sonic-3.6). \"Open\" here is weights-available but non-commercial, like Fish Audio S2 Pro and Higgs TTS 3. For commercially free options, MIT/Apache models such as Chatterbox and Kokoro remain the choice.\nConfidence is medium: the organisation is new, and its language coverage is reported inconsistently.","disputed":[],"related":[{"id":"2026-09-28-elevenlabs-eleven-v4","url":"https://postcutoff.com/e/2026-09-28-elevenlabs-eleven-v4/","date":"2026-09-28","date_precision":"day","short_title":"ElevenLabs launches Eleven v4 and Eleven v4 Turbo, #1 on Artificial Analysis TTS arena","deck":null,"takeaway":null,"category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":11,"official":7,"filed":"2026-09-29","updated":"2026-09-29","orgs":["ElevenLabs"]},{"id":"2026-03-23-mistral-voxtral-tts","url":"https://postcutoff.com/e/2026-03-23-mistral-voxtral-tts/","date":"2026-03-23","date_precision":"day","short_title":"Mistral releases Voxtral TTS, an open-weight 4B text-to-speech model with 3-second voice cloning","deck":null,"takeaway":"With both open ASR and open TTS, Mistral became one of the few frontier labs offering a full open-weight voice stack, giving European and self-hosting customers an alternative to ElevenLabs and OpenAI voices.","category":"open-source","category_label":"Open source","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":5,"official":4,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Mistral AI"]},{"id":"2026-03-09-fish-audio-s2-open-source","url":"https://postcutoff.com/e/2026-03-09-fish-audio-s2-open-source/","date":"2026-03-09","date_precision":"day","short_title":"Fish Audio open-sources S2","deck":"Expressive 80+ language TTS with inline emotion tags","takeaway":"It made open TTS with fine-grained, LLM-style prompt control and production streaming available to the public, and set the open-weights bar for most of 2026.","category":"open-source","category_label":"Open source","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":4,"official":4,"filed":"2026-09-29","updated":"2026-10-13","orgs":["Fish Audio"]}],"people":[],"posts":[{"id":"x-artificialanlys-2092399623839326550","title":"“Breeze TTS 2 is now the leading Open Weights TTS model in the Artificial Analysis…”","url":"https://postcutoff.com/p/x-artificialanlys-2092399623839326550/"}],"videos":[],"models":[{"id":"breeze-tts-2","name":"Breeze TTS 2","url":"https://postcutoff.com/m/breeze-tts-2/"}],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":117,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":56,"in_training_data":false},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":147,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":86,"in_training_data":false}],"short_url":null}