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docs: Improve README.md #300

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38 changes: 22 additions & 16 deletions README.md
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[![CI](https://github.com/getcellm/cellm/actions/workflows/ci.yml/badge.svg)](https://github.com/getcellm/cellm/actions/workflows/ci.yml)

# Cellm
Use AI in Excel formulas to run your prompt on thousands of rows of tasks in minutes.
Use AI in Excel formulas to run your prompt on thousands of rows of data in minutes.

[Website](https://www.getcellm.com) | [Documentation](https://docs.getcellm.com) | [Releases](https://github.com/getcellm/cellm/releases) | ⭐ **Star this repo** to help others discover Cellm!

## What is Cellm?
Cellm is an Excel extension that lets you use Large Language Models (LLMs) like ChatGPT in cell formulas. Cellm's `=PROMPT()` function outputs AI responses to a range of text, similar to how Excel's `=SUM()` function outputs the sum of a range of numbers.

For example, you can write `=PROMPT(A1, "Extract all person names mentioned in the text.")` in a cell's formula and drag the cell to apply the prompt to many rows. Cellm is useful when you want to use AI for repetitive tasks that would normally require copy-pasting data in and out of a chat window many times.

Read more in our [documentation](https://docs.getcellm.com).
For example, you can write `=PROMPT("Extract all person names mentioned in the text.", A1)` in a cell's formula and drag the cell to apply the prompt to many rows. Cellm is useful when you want to use AI for repetitive tasks that would normally require copy-pasting data in and out of a chat window many times.

## Why use Cellm?
- Make quick work of data cleaning, classification, and extraction tasks.
- Enable marketing, finance, sales, operations and other teams to automate everyday tasks without depending on developers.
- Immediately free yourself and your team from repetitive manual work with the spreadsheet they already master.
- Bypass lengthy rollouts of specialized AI apps. Your team already have Excel on their computers.
- Create your own web scraper via MCP servers. Monitor your competitor's blogs, prices, and social media everyday before your daily 09:00 meeting.

> “I love feeding data to ChatGPT, one copy-paste at a time”
> — no one who’s run the same prompt 5 times
Expand All @@ -40,21 +41,24 @@ Just remember that the models do make mistakes at times. They might misunderstan

### Install

1. Go to the [Release page](https://github.com/getcellm/cellm/releases) and download `Cellm-AddIn64-packed.xll` and `appsettings.json`. Put them in the _same_ folder.
1. Go to the [Release page](https://github.com/getcellm/cellm/releases) and download `Cellm-AddIn-Release-x64.msi`.

2. Double-click on `Cellm-AddIn64-packed.xll` and click on "Enable this add-in for this session only" when Excel opens.
2. Run the installer.

3. Download and install [Ollama](https://ollama.com/).
3. Open Excel, choose a provider from the drop-down menu in the Cellm tab, and plug in your API key.

4. Download a model, e.g. Gemma 2 2B: Open Windows Terminal (open start menu, type `Windows Terminal`, and click `OK`), type `ollama pull gemma2:2b`, and wait for the download to finish.
You can also use local models, e.g., via [Ollama](https://ollama.com/). Download and install [Ollama](https://ollama.com/), open Windows Terminal (open start menu, type `Windows Terminal`, and click `OK`), type `ollama pull gemma3:4b`, and wait for the download to finish. Open Excel, choose the Ollama provider from the drop-down menu in the Cellm tab, and you are good to go.

For permanent installation and more options, see our [installation guide](https://docs.getcellm.com/get-started/install).
## Pricing
- **Free tier:** Use local models or your own API keys
- **Paid tiers:** Available for teams needing managed infrastructure and EU data processing
- [View pricing →](https://getcellm.com/pricing)

## Basic usage

Select a cell and type `=PROMPT("What model are you and who made you?")`. For Gemma 3 4B, it will tell you that it's called "Gemma" and made by Google DeepMind.

You can also use cell references. For example, copy a news article into cell A1 and type in cell B1: `=PROMPT(A1, "Extract all person names mentioned in the text")`. You can reference many cells using standard Excel notation, e.g. `=PROMPT(A1:F10, "Extract all person names in the cells")`
You can also use cell references. For example, copy a news article into cell A1 and type in cell B1: `=PROMPT("Extract all person names mentioned in the text", A1)`. You can reference many cells using standard Excel notation, e.g. `=PROMPT("Extract all person names in the cells", A1:F10)`

For more advanced usage, including function calling and configuration, see our [documentation](https://docs.getcellm.com).

Expand All @@ -70,11 +74,13 @@ For detailed information about configuring different models, see our documentati

Cellm is useful for repetitive tasks on both structured and unstructured data:

1. **Text classification:** Categorize survey responses, support tickets, etc.
2. **Model comparison:** Compare results from different LLMs side by side
3. **Data cleaning:** Standardize names, fix formatting issues
4. **Content summarization:** Condense articles, papers, or reports
5. **Entity recognition:** Pull out names, locations, dates from text
1. **Competitive monitoring:** Track competitor pricing across 50 websites daily
2. **Multi-language support:** Analyze customer feedback in 10+ languages
3. **Text classification:** Categorize survey responses, support tickets, etc.
4. **Model comparison:** Compare results from different LLMs side by side
5. **Data cleaning:** Standardize names, fix formatting issues
6. **Content summarization:** Condense articles, papers, or reports
7. **Entity recognition:** Pull out names, locations, dates from text

For more use cases and examples, see our [Prompting Guide](https://docs.getcellm.com/usage/prompting).

Expand All @@ -97,7 +103,7 @@ To help us improve Cellm, we collect limited, anonymous telemetry data:

We do not collect any data from your spreadsheet and we have no way of associating your prompts with you. You can see for yourself at [src/Cellm/Models/Behaviors/SentryBehavior.cs](src/Cellm/Models/Behaviors/SentryBehavior.cs).

You can disable telemetry at any time by adding the following contents to your `appsettings.json` file in the same folder as `Cellm-AddIn64-packed.xll`:
You can disable telemetry at any time by adding the following contents to the `appsettings.Local.json` file in installation directory `C:\Users\{username}\AppData\Roaming\Cellm`:

```json
{
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