Mistral launches Voxtral 3 voice stack: speech models plus a real-time agent SDK
Mistral AI released Voxtral 3, a set of speech recognition and speech synthesis models paired with an SDK that lets a single real-time pipeline listen, reason, call tools and speak back. The recognition models (Small, Mini and Realtime Transcribe 3) cover 50+ languages with speaker diarization, keyword-biasing for technical vocabulary, and transcription latency under 500ms, which Mistral claims beats Whisper, Scribe v2 and Gemini 3.5 Transcribe on its benchmarks. The speech synthesis model, Mini TTS 3, handles 35+ languages and 50+ dialects with emotion, pacing and emphasis that adapt to context, priced at $13 per million characters, and a separate Pro Voice feature can reproduce a person's voice and emotional range from just 30 minutes of recorded audio. All components can run through Mistral's EU-hosted API or be deployed on a customer's own servers.