TypingMind is an advanced ChatGPT interface that supports multiple AI models, including GPT-4, Claude, and Gemini. It offers a range of features such as plugins, a prompt library, and team collaboration tools. Users can connect their own API keys, which may lead to faster response times compared to the standard ChatGPT client. The platform allows for organizing chats into folders, searching through conversations, and seamlessly switching between different AI models, enhancing the overall user experience.