GradeAssist is an advanced AI-powered tool that revolutionizes essay grading for educators. It allows for the customization of rubric criteria, which the AI analyzes to grade and provide feedback based on specific metrics. Featuring a built-in plagiarism checker, GradeAssist ensures academic integrity and includes a grade prediction tool to aid in grading decisions. Additionally, it boasts AI writing detection capabilities to distinguish between human and AI-generated text. GradeAssist leverages AI to support teachers while keeping them in control by analyzing submissions according to teacher-defined rubrics. This tool minimizes grading bias by offering an objective preliminary analysis of student work. Importantly, GradeAssist is designed to complement, not replace, educators by saving time and enhancing assessment objectivity. By integrating essential grading utilities into one platform, GradeAssist serves as a comprehensive grading assistant for teachers.