Use Claude in Excel to Document Your Models

Why It Matters

AI‑driven documentation accelerates model building while preserving auditability, giving finance professionals more time for high‑value analysis and decision‑making.

Key Takeaways

• Claude in Excel consistently generates usable deferred revenue schedules.
• Documentation quality from Claude surpasses ChatGPT and manual models.
• Formula variability remains; Claude 4.6 shows least hard‑coding.
• AI aids mechanical build, freeing time for analysis and presentation.
• Early adoption of AI tools essential for finance professionals now.

Summary

The video demonstrates how Claude, integrated via Excel’s agent, can build and fully document a deferred‑revenue schedule, a common financial‑modeling task. The presenter walks through prompting Claude to generate formulas, link sheets, and produce a separate documentation tab that explains assumptions, logic, and formatting.

Across six trials—two with ChatGPT 5.2, two with Claude in Excel, and two with Open Claude 4.6—the author finds Claude 4.6 the most consistent, producing the fewest hard‑coded values and the cleanest formula structures. While the underlying calculations still vary (index vs. direct references, date‑diff vs. month division), the output remains a usable workbook that can be extended with new rows.

The standout feature, according to the speaker, is Claude’s documentation. Each run generates a step‑by‑step guide, outlines hidden rows, explains conditional‑formatting choices, and even clarifies why dollar signs appear. In contrast, ChatGPT’s output is functional but less polished, and manual FP&A models often lack any documentation at all.

The broader implication is that AI can automate the mechanical, time‑consuming parts of model construction, allowing finance teams to focus on analysis, storytelling, and strategic decisions. However, users must still vet formulas and be prepared for occasional hiccups, underscoring the need for early adoption and continuous refinement of AI‑assisted workflows.

Original Description

In this episode of Financial Modeler’s Corner, host Paul Barnhurst sits down with Ian Schnoor and Giles Male to explore how AI tools like Claude perform inside Excel, building a deferred revenue schedule and testing the limits of automation in financial modeling.

The biggest surprise was not the build quality. It was the documentation depth.

Clear assumptions were outlined without prompting.

Formulas were broken down step by step, with logic explained.

Structure was organized in a way that most teams never have time to produce.

Too often, models are finished at midnight with no documentation left behind.

AI removes the mechanical bottleneck that usually causes that tradeoff.

Speed in execution creates space for higher value thinking and communication.

Professionals who integrate these tools thoughtfully will elevate their impact.

🎧 Listen to the full episode on @thefpandaguy

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