Mistral Voxtral

Mistral Voxtral provides real-time speech-to-text via WebSocket streaming with automatic language detection and low-latency transcription.

Vision Agents uses Stream Video for real-time WebRTC transport by default. External WebRTC transports are supported as well. Most AI providers offer free tiers to get started.

Installation

uv add "vision-agents[mistral]"

Quick start

from vision_agents.core import Agent, User
from vision_agents.plugins import mistral, gemini, deepgram, getstream

agent = Agent(
    edge=getstream.Edge(),
    agent_user=User(name="Assistant", id="agent"),
    instructions="You are a helpful assistant.",
    llm=gemini.LLM("gemini-3-flash-preview"),
    stt=mistral.STT(),
    tts=deepgram.TTS(),
)

Set MISTRAL_API_KEY in your environment or pass api_key directly.

Parameters

Name	Type	Default	Description
api_key	str	None	API key (defaults to MISTRAL_API_KEY env var)
model	str	"voxtral-mini-transcribe-realtime-2602"	Model identifier
sample_rate	int	16000	Audio sample rate in Hz (8000, 16000, 22050, 44100, 48000)

Turn detection

Mistral Voxtral STT does not include built-in turn detection. Pair it with an external turn detection plugin like Smart Turn or Vogent.

from vision_agents.plugins import mistral, smart_turn

agent = Agent(
    stt=mistral.STT(),
    turn_detection=smart_turn.TurnDetection(),
    # ... other config
)

Next steps

Build a Voice Agent

Get started with voice

Build a Video Agent

Add video processing