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17 source-checked cases.
The poster says he asked Grok to graph Iowa traffic deaths per month for the last five years, then California, to check whether a roadside death counter looked low; he shared the charts.
Grok · Data · Source date:
- Build a support data pipeline and dashboard in under an hour with DevinRecreated promptEvidence: Company case study
At Eight Sleep, a support manager who used to need the data team for dashboards built an end-to-end pipeline and dashboard herself with Devin in under an hour, according to Devin's customer story.
Poster says:Under an hour
Devin · Data · Source date:
- Set up a Google Analytics dashboard with Claude in ChromeImproved promptEvidence: Described by posterFailure
Claude in Chrome spent 45 minutes building a Google Analytics dashboard, then couldn't work out how to drag one element, so it undid all of its work and told the poster it couldn't do it.
Claude in Chrome · Data · Source date:
- Turn a year of bank statements into a business expense spreadsheet with Claude CoworkRecreated promptEvidence: Described by poster
Claude Cowork extracted and categorized business expenses from a year of statements across several accounts into a well-organized spreadsheet; after some back-and-forth the poster fixed a handful of items by hand.
Claude Cowork · Data · Source date:
- Build a credit risk scorecard in Excel with Claude in ExcelImproved promptEvidence: Shown on videoPartial
Given a credit risk dataset and a brief for an Excel-native scorecard, Claude in Excel built a polished 28-sheet workbook but skipped the variable clustering, ran the model in JavaScript and reported 0.706 AUC on training data with no split; ChatGPT followed the method and got 0.627 on test data.
Claude (Excel) · Data · Source date:
- Find smarter buying patterns in office supply order history with Claude CodeRecreated promptEvidence: Described by poster
Alex Hillman had Claude Code go through Indy Hall's paper products order history to suggest buying patterns that avoid costly last-minute orders.
Claude Code · Data · Source date:
- Analyze seven years of credit card statements with Claude CoworkRecreated promptEvidence: Screenshots or logs
From seven years of monthly credit card statement PDFs in zip files, Claude Cowork returned an Excel file with 5,726 extracted, categorized transactions plus analysis; issues were vendor transaction IDs and some miscategorized vendors it wasn't told how to handle.
Poster says:5,726 transactions categorized
Claude Cowork · Data · Source date:
- Sort a Google Sheet in a custom priority order with Claude in ChromeImproved promptEvidence: Screenshots or logsFailure
Asked to sort a Google Sheet in a custom order (critical, high, medium, low), Claude for Chrome kept trying to sort it alphabetically instead, per the poster's screenshot.
Claude in Chrome · Data · Source date:
- Build a cohort retention table in Excel with Copilot Agent ModeRecreated promptEvidence: Article or interview
Given a long table of customers by period, Excel's Copilot Agent Mode built a color-coded cohort retention table that DataCamp's reviewer found accurate to the data; it also added a useless chart he had to delete.
Microsoft Copilot Agent Mode (Excel) · Data · Source date:
- Fill missing industry details in a customer sheet with Zapier AgentsRecreated promptEvidence: Company case study
UK energy company egg set up a Zapier Agent that finds customers with missing industry details in a HubSpot-fed Google Sheet, searches for the information and updates the sheet; Zapier says it now takes about five minutes and egg no longer pays a contractor for it.
Poster says:About 5 minutes; contractor no longer needed
Zapier Agents · Data · Source date:
- Let a whole team self-serve data via an agent-written schema guideRecreated promptEvidence: Described by poster
Claude Code wrote a markdown guide to the company's data model and business terms from SQLMesh context and past queries; Hex's agent now handles the team's data requests. The team had posted a data analyst role, and the poster now thinks the role is 'completely dead'.
Claude Code, Hex agent · Data · Source date:
- Merge provider price CSVs into one comparison table with Claude CodeRecreated promptEvidence: Described by poster
Claude Code read several local CSVs of model prices from different providers and produced one organized comparison table grouped by provider.
Claude Code · Data · Source date:
- Automate a daily analytics summary to Slack with Claude CodeRecreated promptEvidence: Described by poster
Claude Code set up a GitHub Actions cron that pulls PostHog data at 8am, summarizes it in Python and posts to Slack; the first report arrived the next morning.
Claude Code · Data · Source date:
- Turn X bookmarks and likes into a searchable knowledge baseRecreated promptEvidence: Described by poster
The poster scraped all their X bookmarks and likes with Claude in Chrome and other tools, cleaned the linked pages with Firecrawl, and built a RAG chatbot over everything they had saved.
Claude in Chrome, Vercel Agent Browser · Data · Source date:
- Analyze every entry of a huge JSONL file with Claude Code subagentsRecreated promptEvidence: Described by poster
Claude Code previewed the data, trimmed fields, defined a schema and ran hundreds of Haiku subagents over ~45 minutes so every entry in a large JSONL file was analyzed.
Claude Code · Data · Source date:
- Compare Claude Code, Codex and Gemini CLI on a 97k-message chat datasetRecreated promptEvidence: Described by poster
The poster gave the same 97k-message WeChat dataset to Claude Code, Codex and Gemini CLI as analysts and published results with an evaluation table.
Claude Code, OpenAI Codex CLI, Gemini CLI · Data · Source date:
- Reproduce an economics paper's findings from replication data with ClaudeEvidence: Article or interview
Given only the paper and its replication archive, Claude Sonnet 4.5 converted the STATA code to Python and reproduced the findings; the author spot-checked the results and GPT-5 Pro confirmed them.
Claude (Sonnet 4.5) · Data · Source date: