Vercel has introduced the AI Gateway API, designed to integrate multiple AI models and providers into applications seamlessly. Originally developed to scale the @v0 model from 1 to over 10 trillion tokens, the AI Gateway addresses limitations and edge cases encountered with various AI vendors. Key features include simplified billing through pass-through with zero markup and a fallback mechanism that ensures service continuity when a primary AI model experiences outages. Developers have begun integrating the AI Gateway into tools such as @aibackends, expanding support for models like Claude Code. The API has been positively received for its ability to streamline AI integration and enhance reliability in app development.