How to Use the =AI() Function in Google Sheets

What the =AI() Function Does

Google Sheets' =AI() function lets you run a Gemini instruction directly in a spreadsheet cell. You write a prompt in plain English, pass in a cell reference, and Gemini processes each row without any manual copy-paste or external tool. The function handles text tasks: generating content, summarizing entries, categorizing values, and analyzing sentiment. It does not write formulas, create charts, or run math calculations.

The function and its alias =Gemini() are interchangeable. Both call the same Gemini model and produce the same output.

Requirements Before You Start

The =AI() function requires a Google Workspace plan at the Business Standard tier or higher. It is not available on the free Gmail tier or legacy G Suite Basic. As of April 2026, it is only available to US users in English.

You also need to enable it. Go to Extensions in your spreadsheet menu and look for Gemini settings, or access it via Insert > Function > AI in a cell. If you do not see it, check that your Workspace admin has enabled Gemini features for your organization.

Basic Syntax

The formula structure is:

=AI("your instruction here", cell_or_range)

For example, to classify customer feedback in column B as positive, neutral, or negative:

=AI("Classify this customer feedback as positive, neutral, or negative", B2)

To apply it across an entire column, enter the formula in C2, then drag it down or select C2:C200 and use Generate and Insert from the prompt that appears above the column.

You can include multiple columns by referencing a row range:

=AI("Write a one-sentence summary of this support ticket based on the subject and description", A2:B2)

Four Tasks the Function Handles Well

Categorization. Assigning rows to buckets is where =AI() saves the most time. If you have a column of customer inquiry types, you can classify each one into predefined categories in a single pass:

=AI("Categorize this inquiry as: billing, technical, shipping, or general", C2)

Summarization. Long text fields such as product reviews, meeting notes, or survey responses can be reduced to a single sentence per row:

=AI("Summarize this review in one sentence", D2)

Sentiment analysis. Marking each row as positive, negative, or neutral gives you a column you can filter and count with standard spreadsheet formulas:

=AI("Is the sentiment of this comment positive, negative, or mixed? Reply with one word.", E2)

Data generation. If you have a list of company names, the function can draft short copy variants for each:

=AI("Write a one-line value proposition for a company called", A2)

The Limits You Need to Know

Most tutorials skip this section. The =AI() function has three hard limits that shape how you should plan your work.

Monthly generation cap. Each Workspace account gets 500 AI function generation interactions per month. This cap resets monthly. If you run the function across 500 rows, you exhaust the monthly limit in a single session. For large datasets, batch your runs across weeks or use the function only on columns where text generation is genuinely necessary.

350 cell maximum per selection. When you select a block of cells and click Generate, only the first 350 cells process. If your dataset is longer, run it in chunks: select rows 2 to 351, generate, then move to rows 352 to 701, and so on.

No access to other sheets or files. The function only reads the data you explicitly pass into the formula. It cannot see other tabs in the same spreadsheet, other files in your Drive, or data from external sources. If you need data from another tab, use a helper column to pull it in with IMPORTRANGE or a direct cell reference before passing it to =AI().

Before You Run: Save a Version

The undo behavior for AI function outputs is inconsistent. In some cases, a standard Ctrl+Z does not fully restore the prior state. Before generating output across a large range, go to File > Version history > Name current version and label it something like "pre-AI-run 2026-04-26." If the output looks wrong or overwrites values you need, you can restore the named version cleanly.

Practical Workflow for Ops Teams

A common use case is processing a weekly export from a CRM or support platform. The typical flow:

1. Export your data to Google Sheets as a CSV import or direct Sheets connection.
2. Identify which text columns need classification or summarization.
3. Add a helper column next to each target column with the =AI() formula.
4. Select the helper column cells for that week's rows, staying under 350 at a time.
5. Click Generate and Insert when prompted.
6. Once generation is complete, copy the output column and paste as values only (Ctrl+Shift+V) to freeze the results before they recalculate.

Pasting as values is important. The =AI() function can recalculate when the spreadsheet refreshes, which consumes more of your monthly generation quota. Freezing output as static text prevents this.

What the Function Does Not Replace

The =AI() function is a text processing layer. It does not replace an analytics workflow when you need statistical analysis, aggregated metrics, trend detection across large datasets, or reproducible outputs. For straightforward text classification on moderate-sized exports, it handles the job without a separate tool. For analysis that goes beyond text generation, tools that accept a file upload and run structured analysis end-to-end are a better fit. VSLZ, for example, handles this kind of workflow from a single file upload with no formula setup required.

Prompt Quality Matters

Vague prompts produce inconsistent outputs. Three patterns that improve reliability:

Constrain the output format. Instead of "summarize this," write "summarize this in one sentence, maximum 20 words." The function respects word and format constraints well.

Enumerate the allowed values. For classification, always list the exact categories: "Classify as: billing, technical, shipping, or general." Without the list, Gemini invents its own category names, which makes the output column impossible to filter consistently.

Test on 10 rows before scaling. Run the formula on a small sample, review the outputs, refine the prompt, and only then apply it to the full column. This saves generation quota and catches prompt issues early.

Summary

The =AI() function brings Gemini into spreadsheet cells with a simple formula syntax. It handles text classification, summarization, and generation row by row without leaving the spreadsheet. The practical ceiling is 500 monthly interactions and 350 cells per generation pass, so it works best for regular batch processing on moderate-sized exports rather than enterprise-scale datasets. Version your spreadsheet before running, paste outputs as values to freeze them, and constrain your prompts with explicit output formats and category lists.