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Large language models (LLMs) such as ChatGPT, Claude Cowork and GitHub Copilot have revolutionised the way individuals and organizations interact with artificial intelligence for content generation, coding assistance and collaborative work. At the core of these advancements lies the concept of tokenization - a fundamental process that dictates how user inputs are interpreted, processed and ultimately billed. Understanding tokenization is crucial for tech-savvy professionals seeking to optimise their usage, predict costs and appreciate the nuanced differences between leading AI platforms.