Mantle revolutionizes software development by using Large Language Models (LLMs) to dramatically reduce the time and effort required for code conversion. Capitalizing on Gemini LLMs' latest advancements and their million-token context windows, the Mantle team was able to convert a prototype project written in R into production-quality code using Golang and ReactJS while maintaining its original logic and structure. This approach saved months of developer time by handling 80% of repetitive coding, allowing engineers to focus on high-value final touches.