OpenRouter

OpenRouter is a unified API that provides access to multiple LLM providers through a single OpenAI-compatible interface. Switch between Claude, Gemini, GPT, and more without changing your code.

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[openrouter]"

Quick Start

from vision_agents.core import User, Agent
from vision_agents.plugins import openrouter, getstream, elevenlabs, deepgram

agent = Agent(
    edge=getstream.Edge(),
    agent_user=User(name="Assistant", id="agent"),
    instructions="You are a helpful assistant.",
    llm=openrouter.LLM(model="anthropic/claude-sonnet-4"),
    tts=elevenlabs.TTS(),
    stt=deepgram.STT(),
)

Set OPENROUTER_API_KEY in your environment or pass api_key directly.

Parameters

Name	Type	Default	Description
model	str	"openrouter/andromeda-alpha"	Model identifier (see available models)
api_key	str	None	API key (defaults to OPENROUTER_API_KEY env var)
base_url	str	"https://openrouter.ai/api/v1"	API base URL
tools_max_rounds	int	3	Maximum tool-call rounds per response

Available Models

Provider	Model ID
Anthropic	anthropic/claude-sonnet-4, anthropic/claude-opus-4
Google	google/gemini-3-flash-preview, google/gemini-3.1-pro-preview
OpenAI	openai/gpt-5.4, openai/gpt-5.4

See OpenRouter Models for the full list.

Next Steps

Build a Voice Agent

Get started with voice

Build a Video Agent

Add video processing