Descriptions:
Riley Brown puts Claude Opus 5 through an intensive Excel stress test, claiming it outperforms Fable at generating professional-grade spreadsheets. The video demonstrates how to connect Claude directly to Microsoft Excel via the Claude add-in — distinct from a Claude Code integration — and walks through several live builds including a fully linked Nvidia financial model with DCF analysis, 30 charts, and an executive dashboard, all sourced from Nvidia’s latest 10-K and SEC filings.
Beyond the Nvidia model, Brown runs Opus 5 on a 24-month startup scenario model featuring bear, base, and bull cases with a working dropdown selector that dynamically updates all tabs. The entire build takes around 10–15 minutes of unattended agent time. Comparisons are drawn between Opus 5, Fable, and Sonnet within the same Excel environment, with Opus 5 singled out for the cleanliness of its formula logic and chart design.
The tutorial is accessible to users on any paid Claude plan and applies broadly to Google Sheets as well. Viewers who work with financial modeling, business analysis, or data reporting will get concrete prompt templates and a setup walkthrough that can be replicated immediately — no coding background required.
📺 Source: Riley Brown · Published July 27, 2026
🏷️ Format: Hands On Build
