OpenRouter를 활용한 통합 LLM API 구축 및 폴백 시스템 구현 가이드

class OpenRouterAgent:
    def __init__(self, model, system_prompt=None, fallbacks=None):
        self.model = model
        self.system_prompt = system_prompt
        self.fallbacks = fallbacks or []
        self.history = []
        if system_prompt:
            self.history.append({"role": "system", "content": system_prompt})
        self.client = OpenAI(
            base_url="https://openrouter.ai/api/v1",
            api_key=os.environ["OPENROUTER_API_KEY"],
        )

# 데모 4 - 폴백 체인 설정
agent = OpenRouterAgent(
    model="openai/gpt-5.4-nano",
    fallbacks=["openai/gpt-5.4", "google/gemini-2.5-pro"]
)
reply = agent.chat("Give me one surprising fact about octopuses.")