Mistral launches Voxtral 3 speech models and a voice-agent SDK covering 50+ languages
Mistral's post has benchmark charts against Whisper and Gemini, plus pricing for each model.
Mistral announced Voxtral 3, a family of speech-to-text and text-to-speech models plus a voice-agent SDK that combines listening, reasoning, tool calling and speaking in one real-time pipeline. Mistral says Voxtral Small Transcribe 3 handles 50 languages, identifies who spoke when and outperforms Whisper, Scribe v2 and Gemini 3.5 Transcribe; the 4B-parameter Mini version costs $0.0035 per minute. Voxtral Mini TTS 3 adjusts emotion and pace across 35+ languages, and a Pro Voice feature adapts a speaker's voice from 30 minutes of audio. It is offered through Mistral's EU-hosted API or for self-deployment.
On Hacker News, commenters joked that the demo's quick French dermatology booking was the least realistic part, regretted that the models aren't open weights, and worried that phone agents wired into company systems could be talked into things; others traded notes on local transcription tools.
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Speaker diarisation
After exploring Voxtral 3: Voice Agent SDK & Speech Models in 50+ Languages, for the "who said what" feature, read about Speaker diarisation.
The process of splitting an audio stream into segments by speaker, answering the question "who spoke when?"
Wikipedia · Wade · 5 min
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Large Hadron Collider
After exploring CERN and Mistral join forces to accelerate AI for science, the machine whose collisions the model will learn from is the Large Hadron Collider.
Describes the world's largest and highest-energy particle accelerator, built by CERN between 1998 and 2008.
Wikipedia · Swim · 30 min
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