# Promptfoo: LLM evals & red teaming

<p align="center">
  <a href="https://npmjs.com/package/promptfoo"><img src="https://img.shields.io/npm/v/promptfoo" alt="npm"></a>
  <a href="https://npmjs.com/package/promptfoo"><img src="https://img.shields.io/npm/dm/promptfoo" alt="npm"></a>
  <a href="https://github.com/promptfoo/promptfoo/actions/workflows/main.yml"><img src="https://img.shields.io/github/actions/workflow/status/promptfoo/promptfoo/main.yml" alt="GitHub Workflow Status"></a>
  <a href="https://github.com/promptfoo/promptfoo/blob/main/LICENSE"><img src="https://img.shields.io/github/license/promptfoo/promptfoo" alt="MIT license"></a>
  <a href="https://discord.gg/promptfoo"><img src="https://img.shields.io/discord/1146610656779440188?logo=discord&label=promptfoo" alt="Discord"></a>
</p>

<p align="center">
  <code>promptfoo</code> is a CLI and library for evaluating and red-teaming LLM apps. Stop the trial-and-error approach - start shipping secure, reliable AI apps.
</p>

<p align="center">
  <a href="https://www.promptfoo.dev">Website</a> ·
  <a href="https://www.promptfoo.dev/docs/getting-started/">Getting Started</a> ·
  <a href="https://www.promptfoo.dev/docs/red-team/">Red Teaming</a> ·
  <a href="https://www.promptfoo.dev/docs/">Documentation</a> ·
  <a href="https://discord.gg/promptfoo">Discord</a>
</p>

> Promptfoo is now part of OpenAI. Promptfoo remains open source and MIT licensed. Read the [company update](https://www.promptfoo.dev/blog/promptfoo-joining-openai/).

## Quick Start

Requires [Node.js](https://nodejs.org/en/download) `^20.20.0` or `>=22.22.0` for npm and npx usage.
[Node.js 20 support ends July 30, 2026 at 00:00 UTC](https://www.promptfoo.dev/docs/installation/#nodejs-runtime-support); upgrade to Node.js 24 LTS before updating promptfoo at or after the cutoff.

```sh
npm install -g promptfoo
promptfoo init --example getting-started
```

Also available via `brew install promptfoo` and `pip install promptfoo`. You can also use `npx promptfoo@latest` to run any command without installing.

Most LLM providers require an API key. Set yours as an environment variable:

```sh
export OPENAI_API_KEY=sk-abc123
```

Once you're in the example directory, run an eval and view results:

```sh
cd getting-started
promptfoo eval
promptfoo view
```

See [Getting Started](https://www.promptfoo.dev/docs/getting-started/) (evals) or [Red Teaming](https://www.promptfoo.dev/docs/red-team/) (vulnerability scanning) for more.

## What can you do with Promptfoo?

- **Test your prompts and models** with [automated evaluations](https://www.promptfoo.dev/docs/getting-started/)
- **Secure your LLM apps** with [red teaming](https://www.promptfoo.dev/docs/red-team/) and vulnerability scanning
- **Compare models** side-by-side (OpenAI, Anthropic, Azure, Bedrock, Ollama, and [more](https://www.promptfoo.dev/docs/providers/))
- **Automate checks** in [CI/CD](https://www.promptfoo.dev/docs/integrations/ci-cd/)
- **Review pull requests** for LLM-related security and compliance issues with [code scanning](https://www.promptfoo.dev/docs/code-scanning/)
- **Share results** with your team

Here's what it looks like in action:

<img src="site/static/img/claude-vs-gpt-example@2x.png" alt="prompt evaluation matrix - web viewer" width="700">

It works on the command line too:

<img src="https://www.promptfoo.dev/img/docs/self-grading.gif" alt="promptfoo command line" width="700">

It also can generate [security vulnerability reports](https://www.promptfoo.dev/docs/red-team/):

<img src="https://www.promptfoo.dev/img/redteam-dashboard@2x.jpg" alt="gen ai red team" width="700">

## Why Promptfoo?

- **Developer-first**: Fast, with features like live reload and caching
- **Private**: LLM evals run 100% locally - your prompts never leave your machine
- **Flexible**: Works with any LLM API or programming language
- **Battle-tested**: Powers LLM apps serving 10M+ users in production
- **Data-driven**: Make decisions based on metrics, not gut feel
- **Open source**: MIT licensed, with an active community

## Learn More

- [Getting Started](https://www.promptfoo.dev/docs/getting-started/)
- [Full Documentation](https://www.promptfoo.dev/docs/intro/)
- [Red Teaming Guide](https://www.promptfoo.dev/docs/red-team/)
- [CLI Usage](https://www.promptfoo.dev/docs/usage/command-line/)
- [Node.js Package](https://www.promptfoo.dev/docs/usage/node-package/)
- [Supported Models](https://www.promptfoo.dev/docs/providers/)
- [Code Scanning Guide](https://www.promptfoo.dev/docs/code-scanning/)

## Contributing

We welcome contributions! Check out our [contributing guide](https://www.promptfoo.dev/docs/contributing/) to get started.

Join our [Discord community](https://discord.gg/promptfoo) for help and discussion.

<a href="https://github.com/promptfoo/promptfoo/graphs/contributors">
  <img src="https://contrib.rocks/image?repo=promptfoo/promptfoo" />
</a>
