Project AURIONAI Use-Cases Research & Innovation
speech synthesis

Kyutai TTS 1.6B (en, fr)

Streaming text-to-speech model based on delayed streams modelling.

KyutaiKyutai
Kyutai
Levelmodel
Classspeech synthesis
Parameters1.8B
Contextnot in the notes
Released30 Jun 2025
Opennessopen weights permissive
Runs onnot in the notes
Statusactive

R&D Topics

Real-time spoken dialogue and low-latency voice generationproduced by

Identity

Developer
Kyutai
Family
not in the notes
Released
30 Jun 2025 sourcesregistry date
Weights published
–
Record checked
12 Oct 2026
Where this comes from
Developer and dates from the research notes. Release date is the vendor's public announcement; weights date is when open weights were published.

Architecture and Size

Architecture
other
Total parameters
1.8B sources
Active parameters
–
Checkpoint parameters
–
Note
Actually 1.8B: a 1B backbone plus a 600M depth transformer.
Context length
not in the notes
Input
text
Output
audio
Where this comes from
Parameter counts as the developer states them. Where the checkpoint holds a different total, both are shown (register A16).

Openness and Access

Openness
open weights permissive
Licence
Creative Commons Attribution 4.0 sources
Access routes
open weights download
Where this comes from
The licence file governs over registry tags and aggregator labels.

Deployment

Runs on
not in the notes
Footprint
not in the notes
Runtimes
not in the notes
Where this comes from
Deployment tiers and runtimes as named in the notes. Footprint is the notes' figure, not a measurement by AURION.

Indonesia

Indonesian support
not stated
Regional languages
not in the notes
Jakarta hosting
unknown
Languages
English, French
Where this comes from
Indonesia fields are carried on every model; unknown is an allowed value.

Benchmark Results

The notes record no benchmark result for this model.

Lineage

The notes record no lineage for this model.

Industry Use Cases

No industry use case links this model.

Sources

  1. huggingface.co/kyutai/tts-1.6b-en_fr https://huggingface.co/kyutai/tts-1.6b-en_fr
  2. github.com/kyutai-labs/delayed-streams-modeling https://github.com/kyutai-labs/delayed-streams-modeling
  3. arxiv.org/abs/2509.08753 https://arxiv.org/abs/2509.08753

To cite this page: Project AURION, AI Use-Cases Research & Innovation, "Kyutai TTS 1.6B (En, Fr)", https://aurion.semai.id/models/kyutai-tts-1-6b-en-fr/, records of October 2026.