Your Universe is a Generator Pre-training (GPT) platform designed for the simulation of ecosystems. As a servie built on the ChatGPT platform, it allows users to conceptualize and simulate their own ecosystems in a chat-style format. Drawing upon the potentialities of artificial intelligence, Your Universe can be utilized to model various types of ecosystems, ranging from a rainforest or a desert, to oceanic food chains and pond ecosystems. This GPT can be particularly beneficial for educational purposes, or for any users interested in studying or creating hypothetical ecosystems. Its prompt starters enable users to learn more about how diverse environmental factors interplay and influence the balance of ecosystems. While it requires a ChatGPT Plus subscription for usage, this unique application of ChatGPT allows for expansive creativity and learning by simulating our planet's ecosystem diversity. To recap, Your Universe provides an interactive and informative platform for users to engage and understand complex ecosystems through simulation based on the extensive capabilities of the ChatGPT platform.