OpenAI has launched a new ChatGPT add-in for Microsoft Excel, enabling users to create, update, and analyze spreadsheets through natural language commands. This integration brings artificial intelligence directly into workbooks, allowing professionals to run complex scenarios and generate outputs based on specific cell data and formulas without leaving the application. The tool, powered by GPT-5.4, is designed to streamline the workflow of building and maintaining spreadsheet models. Instead of manually writing formulas, users can describe their requirements in plain language, and ChatGPT will construct or modify live Excel models. The system preserves existing formulas, structural integrity, and underlying assumptions during these updates. Beyond construction, the add-in offers advanced analytical capabilities. It can interpret large and complex spreadsheets by analyzing how different sheets and formulas interact. When results change, ChatGPT explains the impact and can trace errors or suggest fixes for complicated calculations. To ensure accuracy and build trust, the AI links its answers to the exact cells it utilizes. Furthermore, it requires user permission before making any edits, allowing teams to audit formulas and verify results before committing changes. The ChatGPT add-in is currently available for installation via the Add-in tab within the web version of Microsoft Excel. This release marks a significant step in merging generative AI with traditional data analysis tools, promising to save time for analysts and business users who frequently manage extensive datasets.