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Benchmark LLM performance on legal documents with Google Sheets and OpenRouter

n8nn8n15 modulesv1.0
Google SheetsGoogle Drive

This workflow demonstrates a simple way to run evals on a set of test cases stored in a Google Sheet. The example we are using comes from an info extraction task dataset, where we tested 6 different LLMs on 18 different test cases. This workflow extends the functionality of my simple eval for benchmarking legal tasks here. Rather than running executions sequentially (waiting for each one to respond before making another request), we use parallel processing to fire 2 requests every second. You ca

At a glance

Benchmark LLM performance on legal documents with Google Sheets and OpenRouter is a ready-made n8n workflow you import as a workflow JSON file — no build required. It connects Google Sheets, Google Drive. It's free to download. Follow the 5-step import below to go live in minutes.

Platform
n8n
Connects
Google Sheets, Google Drive
Modules
15
Price
Free
Version
v1.0
Benchmark LLM performance on legal documents with Google Sheets and OpenRouter workflow diagram

About this workflow

This workflow demonstrates a simple way to run evals on a set of test cases stored in a Google Sheet. The example we are using comes from an info extraction task dataset, where we tested 6 different LLMs on 18 different test cases. This workflow extends the functionality of my simple eval for benchmarking legal tasks here. Rather than running executions sequentially (waiting for each one to respond before making another request), we use parallel processing to fire 2 requests every second. You can see our sample data in this spreadsheet here to get started. Once you have this working for our dataset, you can plug in your own test cases matching different LLMs to see how it works with your own data. How it works - Pull our test cases from Google Sheets. - For each case, fire off an HTTP request to a webhook. - That webhook grabs the relevant source file from Google Drive and converts it to text. - The text gets sent to an LLM via Open Router (so we can easily swap out models). - Results come back and are logged in Google Sheets. Set up steps: - Add your credentials for Google Sheets, Google Drive, and OpenRouter. - Make a copy of the original data spreadsheet so that you can edit it yourself. You will need to plug your version in the Update Results node to see the spreadsheet update on each run of the loop.

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How to import this n8n workflow

  1. 1

    Download the workflow JSON file after purchase.

  2. 2

    Open n8n → click the menu → Import from File.

  3. 3

    Select the downloaded JSON and import.

  4. 4

    Set up credentials for each node that requires them.

  5. 5

    Click Execute Workflow to test, then activate.

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