AI Interior Designer is a Generative Pre-trained Transformer (GPT) that assists users in designing and decorating their homes based on specific user input. Users can interact with this tool by submitting a variety of prompts to articulate their design preferences and receive a generated design or design ideas accordingly. The chat-based interface that this GPT uses allows for a dynamic conversation about interior design choices. This tool can work with a wide range of design styles as demonstrated by its prompt starters. For instance, users can request for a Scandinavian style for their living room or a room with natural material elements. It can also suggest ways to alter the color palette of a room to fit the user's liking, or inspire them with specific genre elements, such as cyberpunk. This GPT can be a valuable tool for those looking to design a space but need a starting point or some guidance in the process. Its ability to generate varied design ideas based on straightforward prompts makes it very user-friendly and versatile. Thus, it can facilitate the design process, giving users the convenience and creativity of an interior designer, all powered by AI.