From the source
Mistral has launched 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 streaming pipeline.
- The stack is built for contact centers, service desks, virtual assistants, and hands-free copilots, and is available now through Mistral's EU, US, and global API endpoints.
- Companies can also deploy it in a private cloud or on their own infrastructure.
- Voxtral Small Transcribe 3 covers more than 50 languages with diarization, context biasing, and end-of-turn detection, and in Mistral's 45-language FLEURS chart it records forced and inferred error rates of 4.1% and 4.0%.
- The 4-billion-parameter Voxtral Mini Transcribe 3 costs $0.0035 per minute for batch use, while the realtime version costs $0.008 per minute and runs at sub-500 millisecond latency.
- Voxtral Mini TTS 3.0 delivers batch and realtime speech in more than 35 languages and over 50 dialects for $13 per million characters, and supports prompt instructions, contextual TTS, a vocabulary library, and voice cloning from more than 30 minutes of audio.
- The LiveKit-based SDK runs transcription, reasoning, tool use, and speech generation concurrently, keeping turns under one second and stopping the agent when a caller cuts in.