Mistral releases Voxtral TTS, an open-weight 4B text-to-speech model with 3-second voice cloning
Confirmed
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- 3 of 5
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 AstraIn its training data
- Claude Opus 5.5In its training data
- Gemini 4 HydrogenIn its training data
- Grok 4.7In its training data
It happened before the cutoffs of all four assistants, so it can be in their training data.
Key facts
- API id voxtral-tts-2603; HF weights mistralai/Voxtral-4B-TTS-2603 (CC BY-NC 4.0, non-commercial)
- Architecture: 3.4B transformer decoder + 390M flow-matching acoustic transformer + 300M neural codec
- 9 languages: English, French, German, Spanish, Dutch, Portuguese, Italian, Hindi, Arabic
- ~70 ms model latency, ~9.7x real-time factor, up to 2 minutes of native audio
- 68.4% win rate vs ElevenLabs Flash v2.5 in multilingual voice-cloning preference tests (Mistral)
- Price: $0.016 per 1K characters
- Followed Voxtral Transcribe 2 (2026-02-04): Voxtral Mini Transcribe V2 ($0.003/min) and open Apache-2.0 Voxtral Realtime 4B
What happened
Mistral added speech output to its Voxtral audio family. Voxtral TTS is served on the Mistral API
(/v1/audio/speech), in Le Chat and Mistral Studio, and its weights were published on Hugging Face under a
non-commercial license. Six weeks earlier Mistral had shipped Voxtral Transcribe 2, including the open Apache-2.0
Voxtral Realtime streaming ASR model (sub-200 ms latency).
Why it matters
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. Quality comparisons are Mistral-reported.
Sources
5 sources from 4 sites. Numbers match the chips in the text.
5 sources: 4 primary, 1 press
Primary
- Mistral AI - Speaking of Voxtralmistral.ai, official
- Mistral docs - Voxtral TTS model carddocs.mistral.ai, docs
- Hugging Face - Voxtral-4B-TTS-2603huggingface.co, code
- Mistral AI - Voxtral Transcribe 2mistral.ai, official
Press
- SiliconANGLE - Mistral releases an open-weights ‘speaking’ AI modelsiliconangle.com, press
Changes
- Filed