OpenRouter is an advanced platform that serves as a unified interface for Large Language Models (LLMs). It allows users to find the best models and pricing for their specific needs. The platform supports a wide range of AI models like OpenAI GPT-4, Claude AI, and Google Palm, providing a cost-effective, performance-optimized, and flexible method for managing AI applications. Users can easily integrate OpenRouter into their existing systems through a well-documented API, and it also supports multiple prompts for enhanced flexibility.