Enterprise

ChatGPT moves inside Excel and Google Sheets across every plan, with enterprise free preview ending June 2

OpenAI's spreadsheet-native sidebar is now generally available on GPT-5.5, putting ChatGPT in direct collision with Microsoft Copilot inside the workbook itself.

By Asher Glick · Enterprise software desk · 2026-05-29 · 4 min read

Photo: Unsplash / Mika Baumeister — Spreadsheet open on a laptop screen with rows of financial data

OpenAI declared ChatGPT for Excel and Google Sheets generally available on May 5, 2026, putting a GPT-5.5-powered sidebar directly inside the two spreadsheet applications that run most of the world’s financial work. The sidebar can build models, update cells, trace errors, explain formulas, and reason across multi-tab workbooks, asking the user’s permission before making changes. It ships to every plan tier OpenAI sells: Free, Go, Pro, Plus, Business, Enterprise, Edu, and K-12.

The free preview for Business, Enterprise, Edu, and K-12 customers ends June 2, 2026, after which usage follows each plan’s credits and terms. That’s the actual news under the news. OpenAI spent six months getting the surface in front of corporate users at zero marginal cost, and now flips the meter on.

The competitive geometry is unsubtle. Microsoft Copilot lives inside Excel because Microsoft owns Excel. ChatGPT now lives there too, as a guest the user installs voluntarily, which is a structurally different proposition than Copilot’s pre-installed default. Google, Anthropic, and Microsoft are all chasing the same enterprise workflow layer, but OpenAI is the one putting a rival assistant inside its largest investor’s flagship productivity app.

The financial-services tilt is deliberate. Reusable Skills ship with defaults for financial modeling and corporate finance formatting, and OpenAI is wiring in data from FactSet, Dow Jones Factiva, LSEG, Daloopa, and S&P Global. VentureBeat reports templates for earnings previews, comparables analysis, DCF analysis, and investment memo drafting. The target user is an analyst whose entire workday is a workbook.

Enterprise controls reflect the lessons of the last two years. Access is off by default in Enterprise, Edu, and Teacher workspaces; admins enable it via custom roles and group permissions. Enterprise Key Management, a Compliance API, and a training opt-out (on by default for Enterprise data) come with the package.

Read against OpenAI’s June 2025 Connectors for Gmail, Drive, Outlook, SharePoint, and GitHub, and the October 2025 GPT-5-powered “company knowledge” search, the trajectory is legible. The consumer chatbot is being rebuilt, surface by surface, as enterprise software. The spreadsheet was the last room it hadn’t entered.

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