OpenAI shipped ChatGPT for Excel and Google Sheets globally on May 5, putting a GPT-5.5 powered AI sidebar directly inside Microsoft Excel and Google Sheets for every paid and free plan. The launch turns a long-running beta into a general release and quietly resets the floor of what people expect a spreadsheet to be. Business, Enterprise, Edu, and K-12 customers get a free usage preview through June 2 before the feature falls back to per-plan credit accounting.
What’s actually new
ChatGPT for Excel and Google Sheets is a sidebar that lives inside the spreadsheet, talks to the cells next to it, and edits them when you ask it to. It is not a screenshot tool, not a chatbot that explains things in a separate window, and not a wrapper that copies cells into ChatGPT and pastes results back. The sidebar reads the workbook in place, references specific cells and tabs in its responses, and writes back changes with the same fidelity a power user would. Multi-tab files, cross-sheet formulas, named ranges, and the Excel object model all work; the assistant treats the workbook as a graph, not a flat table.
The model underneath is GPT-5.5, the same family that became the ChatGPT default a week earlier on May 5. The reliability improvements that ship with GPT-5.5 — including the 52.5% reduction in hallucinated claims on high-stakes prompts — carry directly into the spreadsheet experience. That matters because spreadsheet errors are the kind of failure mode that bites quietly. A wrong number in a forecast does not look wrong; you find out at a budget meeting.
Plan availability is the headline that surprised most observers. The feature is free across every ChatGPT plan: Free, Go, Plus, Pro, Business, Enterprise, Edu, and K-12. Business, Enterprise, Edu, and K-12 customers get an unlimited free preview through June 2, 2026; after that, usage counts against each plan’s credit allocation. Free, Go, Plus, and Pro users follow standard usage limits from day one. OpenAI clearly wants the feature in everyone’s hands fast.
The Sheets integration ships through the Google Workspace Marketplace; the Excel integration runs as an Office Add-in for Microsoft 365 (desktop and web) and Excel 2021/2024. Both share the same sidebar UX and reach back to the same ChatGPT account, so context and memory follow the user across files and devices.
The documented task surface includes spreadsheet cleanup, trackers and budgets, formula writing and explanation, multi-tab file work, scenario modeling, and financial data integrations. That last item is the second piece of the same release: OpenAI rolled out named third-party financial data providers so the assistant can pull live market and reference data inline. The financial piece is rate-limited and Business-and-above only today.
Why it matters
- The spreadsheet is the world’s most-used “low-code” environment. Estimates put global Excel and Sheets users at over 1.5 billion. A genuinely native AI sidebar inside the surface most knowledge workers spend hours in is the kind of shift that compounds across the whole economy, not just inside tech companies.
- The free tier moves the floor for everyone. Microsoft’s Copilot has been the dominant spreadsheet AI for Excel users with a $30 per user per month price tag; Google’s Gemini sidebar has been Workspace-bundled. ChatGPT for Excel and Sheets puts a third option in front of every user for free, with usage that scales by plan rather than gated by SKU.
- The cross-tab, formula-aware editing is the part competitors have struggled to match. Most spreadsheet AI tools handle a single sheet or a flat table well and fall apart on workbooks with five tabs, named ranges, and circular references. The OpenAI version handles that surface natively because GPT-5.5 has long-context window economics that did not exist a year ago.
- Finance, ops, and accounting workflows just got measurably faster. The tasks the assistant is documented to handle (cleanup, formulas, scenario modeling) are exactly the tasks finance and ops teams burn the most hours on. The cycle time compression is large and visible.
- The Business and Enterprise preview window is a real procurement timing decision. Free unlimited usage through June 2 gives larger teams about three weeks to deploy widely before the credit accounting kicks in. Teams that get value during the preview will buy more credits; teams that wait will be evaluating with an inferior usage budget.
How to use it today
The install path is short. The interesting work starts after the install, when you point ChatGPT at a real workbook and start exercising the cross-tab, formula-aware capabilities. The order below is the install-and-validate workflow we recommend for any team picking the assistant up this week.
- Install the add-in. For Excel: open the Office Store and search “ChatGPT,” install the official OpenAI add-in. For Google Sheets: open the Google Workspace Marketplace, search “ChatGPT,” install and grant the requested permissions.
- Sign in with the ChatGPT account that holds your plan. Memory and history follow the account, not the workbook.
- Open the sidebar on a real workbook. Use one with multiple tabs, formulas, and at least a few hundred rows of data. Demo workbooks teach you less than five minutes with your own files.
- Ask for an explanation first. “Walk me through the assumptions and the inputs in this workbook.” The assistant’s first answer tells you how well it grasped your file.
- Ask for an edit second. “Add a new tab called Scenario 2 that recalculates revenue with a 12 percent price increase and 3 percent volume decrease.” Watch how it handles the new tab, the formulas, and the cross-references.
- Ask for a validation third. “Find any cells in this workbook that reference a different tab incorrectly or that have a hard-coded value that should be a formula.” This is the kind of audit work humans skip and the assistant does well.
- Save a version before you accept any large change. The assistant edits the live workbook; treat AI edits like any other edit and version them.
For API users who want to invoke the same model that powers the sidebar from outside the spreadsheet, the underlying call is the GPT-5.5 chat completions endpoint with the spreadsheet system prompt OpenAI uses internally exposed as a preset. The minimum viable code looks like this.
from openai import OpenAI
client = OpenAI()
resp = client.chat.completions.create(
model="gpt-5.5",
messages=[
{"role": "system", "content": (
"You are a spreadsheet assistant. The user will paste a workbook structure "
"(tabs, columns, sample rows, named ranges). Plan changes step by step. "
"Reference cells using A1 notation with sheet prefix (e.g. Forecast!B7). "
"Output a structured change list: tab, range, action, new_value_or_formula."
)},
{"role": "user", "content": (
"Workbook: tabs = [Inputs, Forecast, Scenarios]. "
"Forecast!B7 = revenue assumption (currently 0.08). "
"Add a Scenario 2 tab that mirrors Forecast with revenue assumption = 0.12."
)},
],
)
print(resp.choices[0].message.content)
For teams scripting against the Office.js add-in surface directly, the assistant exposes a small set of structured commands that the sidebar runs against the workbook. Most users will never interact with these; the schema below is for power users building workbook templates that an AI agent can fill out programmatically.
{
"actions": [
{"type": "create_sheet", "name": "Scenario 2"},
{"type": "copy_formulas", "from": "Forecast!A1:Z200", "to": "Scenario 2!A1:Z200"},
{"type": "set_value", "ref": "Scenario 2!B7", "value": 0.12},
{"type": "set_format", "ref": "Scenario 2!B7", "number_format": "0.0%"}
]
}
How it compares
Three serious spreadsheet AI products now compete inside the same surface. The table below summarizes the differences as of the May 5 launch.
| Product | Where it lives | Underlying model | Price for everyday user | Best at |
|---|---|---|---|---|
| ChatGPT for Excel and Sheets | Sidebar in Excel and Google Sheets | GPT-5.5 | Free across all plans (credits scale with plan) | Cross-tab edits, scenario modeling, cleanup |
| Microsoft Copilot in Excel | Native ribbon in Excel | GPT-4o and o-series via Azure | $30 per user per month on top of Microsoft 365 | Deep Microsoft 365 integration, enterprise compliance |
| Gemini in Google Sheets | Side panel in Sheets | Gemini 3.5 Pro | Bundled with Google Workspace Business Plus and above | Native Google Workspace context, Slides and Docs continuity |
| Claude in Excel (beta) | Add-in for Excel; part of Anthropic’s finance suite | Claude Opus 4.7 | Claude Max or Anthropic Enterprise | Finance-specific tasks, contract and statement analysis |
| Equals AI | Native AI spreadsheet (separate app) | Multi-model | $25 per user per month | Building modern analytical spreadsheets from scratch |
The decision tree is simple. If you live in Microsoft 365 and pay for Copilot, the new ChatGPT option does not force a switch but pressures the Copilot cost case. If you live in Google Workspace, Gemini is the default and ChatGPT is a complement. If you have neither, the new option puts a serious spreadsheet AI in front of you at zero cost.
What’s next
Three threads worth watching between now and the end of summer. First, the credit accounting that kicks in for Business and Enterprise customers on June 2 will set the real price of widespread AI spreadsheet usage. Expect more disclosure from OpenAI on per-task credit costs in the next four weeks; build your internal cost projections around the published rates rather than the preview behavior. Second, expect Microsoft to respond competitively, either by deepening Copilot’s integration into Excel-specific workflows (pivot tables, Power Query, Power Pivot) or by adjusting pricing. The pricing path is the harder one because Microsoft has positioned Copilot as the enterprise AI commitment; cutting the price weakens that posture. Third, expect Google to bundle Gemini in Sheets more aggressively into lower Workspace tiers as the ChatGPT option matures.
The longer arc: spreadsheets are about to become the largest live AI canvas on the consumer internet by user count, because they are where people already do the work AI is good at. The May 5 launch is the moment that became official.
Frequently Asked Questions
Do I need a paid ChatGPT plan to use this?
No. The integration is available to Free plan users as well as every paid tier. Free users follow standard Free plan usage limits; if you hit a usage cap, you can either wait, upgrade, or come back later. The feature is fully functional on Free; the only difference is rate limit headroom.
Does it work offline or with private data?
The assistant is cloud-based and requires a network connection. Workbook content the user shares with the sidebar is sent to OpenAI under the same data handling terms as the user’s ChatGPT plan. Enterprise plans include standard enterprise data controls (no model training on customer data, data residency options on supported regions, DPA in place). Free and Plus plans inherit the consumer terms; if you have sensitive data, use a Business or Enterprise plan or air-gap the workbook before using the assistant.
Can it write VBA, Office Scripts, or Apps Script macros?
Yes. The assistant can write VBA for Excel desktop, Office Scripts for Excel for the web, and Apps Script for Google Sheets. Generated scripts run inside the standard developer surface for each product; treat them like any other macro and review before enabling.
How does this compare to Microsoft Copilot in Excel?
Copilot is deeper in Microsoft 365-native workflows (pivot, Power Query, Power Pivot, ribbon integration) and costs $30 per user per month on top of Microsoft 365. ChatGPT for Excel is broader (works on both Excel and Sheets, available across every ChatGPT plan including Free) and is currently free for every user. Many teams will run both; the choice is not zero-sum.
What financial data sources does the integration support?
The financial data integrations that launched with ChatGPT for Excel include named third-party providers covering market data, fundamental data, and reference data. Access is rate-limited and available on Business and Enterprise plans today. OpenAI has signaled more providers coming over the summer; check the OpenAI help center for the current list before designing a workflow around any single source.
Does this replace ChatGPT for Excel beta access I already had?
Yes. The May 5 release converts the prior beta into general availability across every plan. Existing connections, history, and memory carry over; reinstall the add-in if you see version-mismatch warnings.