# OpenAI (default)
    agent = DeepResearchAgent(
        model="o3-deep-research",
        instructions="You are a professional researcher."
    )
    
    # Gemini
    agent = DeepResearchAgent(
        model="deep-research-pro",
        instructions="You are a professional researcher."
    )
    
    # Using LiteLLM
    agent = DeepResearchAgent(
        model="o3-deep-research",
        use_litellm=True
    )
    
    result = agent.research("Research the economic impact of AI on healthcare.")
    print(result.report)