QuickGPT is a website created by Sindre Sorhus that provides an easy way to access ChatGPT. It offers quick access to ChatGPT with the ability to summon it from the menu bar dock or use a keyboard shortcut. The top 5 features of QuickGPT are: keyboard shortcut activation, menu bar dock activation, fast loading speeds, simple user interface, and easy integration into the workflow. Top 5 use cases for QuickGPT include: using it to quickly chat with friends, streamlining work conversations, making customer service interactions easier, improving team collaboration, and automating tasks.