Empirical

Empirical is the fastest way to test different LLMs and model configurations, across all the scenarios that matter for your application.

With Empirical, you can

• Run your test datasets locally against off-the-shelf or custom models
• Compare model outputs on a web UI, and test changes quickly
• Score your outputs with scoring functions
• Run tests on CI/CD

Empirical-TS-demo-video.mp4

Usage

See all docs →

Empirical bundles together a test runner and a web app. These can be used through the CLI in your terminal window.

Empirical relies on a configuration file, typically located at empiricalrc.js which describes the test to run.

Start with a basic example

In this example, we will ask an LLM to extract entities from user messages and give us a structured JSON output. For example, "I'm Alice from Maryland" will become {name: 'Alice', location: 'Maryland'}.

Our test will succeed if the model outputs valid JSON.

1. Use the CLI to create a sample configuration file called empiricalrc.js.

   npm init empiricalrun
   
   # For TypeScript
   npm init empiricalrun -- --using-ts

2. Run the example dataset against the selected models.

   npx empiricalrun

   This step requires the OPENAI_API_KEY environment variable to authenticate with OpenAI. This execution will cost $0.0026, based on the selected models.

3. Use the ui command to open the reporter web app and see side-by-side results.

   npx empiricalrun ui

Make it yours

Edit the empiricalrc.js file to make Empirical work for your use-case.

• Configure which models to use
• Configure your test dataset
• Configure scoring functions to grade output quality

Contribution guide

See development docs.