Get accurate answers from Excel files and CSVs with The Spreadsheet Analyst for Claude, plus a prompt that works in ChatGPT and Gemini.
13 min readBeginner
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Ask an AI chat what your sales file says and you'll get an answer in seconds. It will sound sure of itself. And some of those numbers will be wrong, in ways you can't see unless you redo the math yourself.
This tutorial shows you why that happens, how to catch it, and how to use The Spreadsheet Analyst, a plugin for Claude that calculates every figure with code against your real rows and tells you up front whether your file can answer the question at all. Everything shown below is real output from the plugin's demo files. Not on Claude? Sections 02, 03, and 10 work on their own.
Section 01