{"message":"Welcome to Multi-Model AI Chat API","endpoints":{"GET /models":"Get available models","POST /chat":"Chat with AI models","POST /chat-aggregate":"Get aggregated response from multiple models"},"usage":{"chat":"Use POST /chat with {'prompt': 'your message', 'model_name': 'openai'}","aggregate":"Use POST /chat-aggregate with {'model1': 'openai', 'model2': 'google', 'main_model': 'anthropic', 'question': 'your question'}"}}