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Smart Turn uses neural models (Silero VAD + Whisper features) to detect when a speaker has completed their turn. Provides natural conversation flow without relying solely on silence detection.
Vision Agents requires a Stream account for real-time transport. Most providers offer free tiers to get started.

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Installation

uv add "vision-agents[smart_turn]"

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Quick Start

from vision_agents.core import Agent, User
from vision_agents.plugins import smart_turn, gemini, deepgram, elevenlabs, 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=deepgram.STT(),
    tts=elevenlabs.TTS(),
    turn_detection=smart_turn.TurnDetection(),
)
Models download automatically on first use.

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Parameters

NameTypeDefaultDescription
buffer_in_secondsfloat2.0Audio buffer duration
confidence_thresholdfloat0.5Turn completion threshold (0-1)
sample_rateint16000Audio sample rate

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Events

from vision_agents.core.turn_detection.events import TurnStartedEvent, TurnEndedEvent

@turn_detection.events.subscribe
async def on_turn_ended(event: TurnEndedEvent):
    print(f"User finished: confidence={event.confidence}")

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Next Steps

Build a Voice Agent

Get started with voice

Build a Video Agent

Add video processing