The Open Weights
LatestModelsLeaderboardsCompanies
Subscribe
The Open Weights

The daily record of open-source AI. New model releases, leaderboards, and what's coming next — written for people who ship.

Refreshed every 12 hours

Discover

  • Latest releases
  • New today
  • Trending models

Browse

  • All models
  • Companies
  • Categories
  • Leaderboards

About

  • About
  • Editorial policy
  • Hardware estimates
  • RSS feed
  • llms.txt
  • Newsletter

© 2026 The Open Weights. An independent publication.

PrivacyTermsSMSAggregated by Claude · curated by humans.
LatestMistral AI4B TTS
Mistral AIText → Speech

Mistral AI Releases Voxtral, an Open-Source TTS Model

The French AI leader expands beyond large language models with a new, 4-billion-parameter model for generating multilingual speech.

Nov 17, 2025
NotableApache 2.0
Voxtral 4B TTS

Mistral AI, known for its influential open-weight language models, has ventured into a new domain with the release of Voxtral 4B TTS. The new 4-billion-parameter model is designed for multilingual text-to-speech (TTS) synthesis and is available under the permissive Apache 2.0 license.

The release marks a significant expansion for the company, moving it beyond its core focus on text generation and into the competitive space of open-source generative audio. While Mistral has built its reputation on models like Mistral 7B and Mixtral, Voxtral is its first major public release dedicated to audio synthesis.

A New Voice in Open Audio

The model's size suggests a focus on generating high-quality, natural-sounding speech across multiple languages. Developers and researchers can access the model and its technical details directly from its official repository on Hugging Face.

By choosing the Apache 2.0 license, Mistral AI is enabling broad commercial and research use. The availability of a powerful, open-source TTS model could accelerate development in areas like customized voice assistants, automated content creation, and accessibility tools, providing a strong alternative to proprietary APIs.

Sources

  • mistralai/Voxtral-4B-TTS-2603

    Hugging Face

    Visit
OlderNari Labs Releases Dia2-2B, an Open Voice Cloning ModelNari Labs · Text → Speech · 12 months agoNewerTencent Releases 1B Parameter HunyuanOCR ModelTencent · Vision-Language · 11 months ago

Get the model

Hugging Face

Specs

Parameters4B
Sample rate24 kHz
Languages9 languages
LicenseAPACHE-2.0
Downloads1.8K
Likes954

Can you run it?

Runs on a laptop — about 5 GB at FP8.

  • BF16 (as published)

    12 GB GPU (RTX 3060 / 4070) · 16 GB Mac

    9 GB
  • FP8

    8 GB GPU (RTX 4060) · 16 GB laptop or Mac

    5 GB
Your machine
  • Precision not published; assuming 16-bit (BF16) weights.
  • Parameter count is an editorial estimate — no weights metadata on Hugging Face.

Estimated from the parameter count. Assumes an 8K context and ~1 GB runtime overhead; actual needs vary. How we estimate


Modalities

Text → Speech

The Weekly Weights

Every open release that mattered, one email a week.

0 comments

No comments yet. Be the first to weigh in.

More from Mistral AI

All Mistral AI releases →
Mistral Large 4 (1T-A52B)
Mistral AI/Text / LLMDatacenter

Mistral Large 4 Arrives as a 1T-Parameter MoE

The new flagship pairs a trillion total parameters with 52B active per token and adds vision alongside multilingual text.

Oct 29, 2026
Timestral-209M
Mistral AI/Text / LLMRuns anywhere

Mistral's Timestral brings forecasting to open weights

The French lab releases a compact 209M-parameter foundation model aimed squarely at time-series prediction.

Oct 14, 2026
Mistral AI/Text / LLMDatacenter

Mistral Large 4 arrives as a trillion-param MoE

The new flagship is a sparse mixture-of-experts model with roughly 49B active parameters per token.

Oct 6, 2026

More in Text → Speech

All Text → Speech →
LFM3-Omni-2B
LiquidAI/Any-to-AnyRuns anywhere

Liquid AI's LFM3-Omni-2B brings any-to-any AI to the edge

The 2-billion-parameter model combines vision, audio and speech-to-speech in a package small enough to run on device.

Oct 21, 2026
IBM/Any-to-Any

IBM's Granite Switch 4.1 Unifies Chat, Logic, Speech

A single endpoint now routes text conversation, decision-making, and speech synthesis across IBM's Apache-licensed Granite line.

Oct 15, 2026
Fish Audio Drama 3
Fishaudio/Text → SpeechWorkstation GPU

Fish Audio's Drama 3 brings MoE to open TTS

The open-source speech model pairs a 35B mixture-of-experts backbone with voice cloning and directed performance control.

Oct 1, 2026