ChatHub is a comprehensive chatbot client that allows users to access multiple chatbots in one application. It supports various popular chatbots including ChatGPT, Bing Chat, Google Bard, Claude, and other large language models. With ChatHub, users can chat with multiple chatbots simultaneously, facilitating easy comparison of their responses. It offers support for ChatGPT API, Azure OpenAI service, and even the upcoming GPT-4. The tool provides additional features such as a prompt library, shortcuts for quick activation, support for markdown and code highlighting, data export/import functionality, and the ability to access it conveniently from the Chrome side panel.