Kyutai Pocket TTS
Speech and audio
kyutai/pocket-tts
Price not published
Kyutai TTS 1.6B / Kyutai STT + Unmute
Model idkyutai/tts-1.6b-en_fr
PricePrice not published
Checked29 September 2026
Where it stands
91newer 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
- Before it from Kyutai
- Kyutai Moshi / Hibiki-Zero (full-duplex speech models)17 Sep 2024
- After it from Kyutai
- Kyutai Pocket TTS13 Jan 2026
- Weights
- Weights are public. Licence: CC BY 4.0. See the licence for commercial terms.
How to call it
4 ways to use Kyutai TTS 1.6B / Kyutai STT + Unmute, with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Hugging Face (TTS) | kyutai/tts-1.6b-en_fr |
huggingface.co | |
| Hugging Face (STT) | kyutai/stt-2.6b-en |
huggingface.co | |
| Hugging Face (STT) | kyutai/stt-1b-en_fr |
huggingface.co | |
| GitHub (Unmute) | github.com |
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
- CC BY 4.0
- Released
- 3 July 2025
- Status
- Current
- Type
- Speech and audio
What stands out
What its maker marketed at launch, and what people found later, each with its source.
Text-streaming TTS
Delayed-streams architecture (~1.8B params incl. 600M depth transformer) starts speaking before the full text is available, English + French; voices only via pre-computed embeddings (no raw cloning, by design).
Streaming STT with semantic VAD
stt-2.6b-en (English, 2.5 s delay) and stt-1b-en_fr (0.5 s delay) transcribe as audio arrives; used in Unmute, which wraps any text LLM with real-time STT+TTS.
Notes
STT open-sourced 2025-06-19, TTS + Unmute open-sourced 2025-07-03 (Kyutai blog). Weights CC-BY-4.0. For CPU TTS see kyutai-pocket-tts.
Sources: https://kyutai.org/blog/ , https://huggingface.co/kyutai/tts-1.6b-en_fr , https://huggingface.co/kyutai/stt-2.6b-en