Setun 69 is a GPT designed to operate as a Setun-70 simulator, seamlessly integrating with modern API systems. This tool leverages the ChatGPT platform's capabilities to facilitate computational categorical rewriting. Integrating with modern APIs, it enhances users' ability to experiment and engage with the Setun-70 computational system in an interactive and user-friendly interface. The GPT updates the outdated computing system, known for its ternary logic, and weaves it into contemporary, digital infrastructure systems, thereby making it more accessible to users. ChatGPT Plus membership is a requirement to access Setun 69. Users are greeted with a welcome message, 'Welcome to the Setun-70 simulator!', guiding them towards interactive computational categorical rewriting. The adoption of Setun 69 creates an opportunity to learn, explore, and understand ternary computational systems with the backing of modern technology.