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vibrantlabsai/ragas · source

Snapshot 0 · 2026-11-04T12:47:27Z · Python · Apache-2.0

GitHub description at capture

Supercharge Your LLM Application Evaluations 🚀

README at capture

<h1 align="center">
  <img style="vertical-align:middle" height="200"
  src="https://raw.githubusercontent.com/vibrantlabsai/ragas/main/docs/_static/imgs/logo.png">
</h1>
<p align="center">
  <i>Supercharge Your LLM Application Evaluations 🚀</i>
</p>

<p align="center">
    <a href="https://github.com/vibrantlabsai/ragas/releases">
        <img alt="Latest release" src="https://img.shields.io/github/release/vibrantlabsai/ragas.svg">
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        <img alt="License Apache-2.0" src="https://img.shields.io/github/license/vibrantlabsai/ragas.svg?color=green">
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    <a href="https://pypi.org/project/ragas/">
        <img alt="Ragas Downloads per month" src="https://static.pepy.tech/badge/ragas/month">
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        <img alt="Join Ragas community on Discord" src="https://img.shields.io/discord/1119637219561451644">
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        alt="Ask DeepWiki.com" 
        height="20" 
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<h4 align="center">
    <p>
        <a href="https://docs.ragas.io/">Documentation</a> |
        <a href="#fire-quickstart">Quick start</a> |
        <a href="https://discord.gg/5djav8GGNZ">Join Discord</a> |
        <a href="https://blog.ragas.io/">Blog</a> |
        <a href="https://newsletter.ragas.io/">NewsLetter</a> |
        <a href="https://www.ragas.io/careers">Careers</a>
    <p>
</h4>

Objective metrics, intelligent test generation, and data-driven insights for LLM apps

Ragas is your ultimate toolkit for evaluating and optimizing Large Language Model (LLM) applications. Say goodbye to time-consuming, subjective assessments and hello to data-driven, efficient evaluation workflows.
Don't have a test dataset ready? We also do production-aligned test set generation.

## Key Features

- 🎯 Objective Metrics: Evaluate your LLM applications with precision using both LLM-based and traditional metrics.
- 🧪 Test Data Generation: Automatically create comprehensive test datasets covering a wide range of scenarios.
- 🔗 Seamless Integrations: Works flawlessly with popular LLM frameworks like LangChain and major observability tools.
- 📊 Build feedback loops: Leverage production data to continually improve your LLM applications.

## :shield: Installation

Pypi:

```bash
pip install ragas
```

Alternatively, from source:

```bash
pip install git+https://github.com/vibrantlabsai/ragas
```

## :fire: Quickstart

### Clone a Complete Example Project

The fastest way to get started is to use the `ragas quickstart` command:

```bash
# List available templates
ragas quickstart

# Create a RAG evaluation project
ragas quickstart rag_eval

# Specify where you want to create it.
ragas quickstart rag_eval -o ./my-project
```

Available templates:
- `rag_eval` - Evaluate RAG systems

Coming Soon:
- `agent_evals` - Evaluate AI agents
- `benchmark_llm` - Benchmark and compare LLMs
- `prompt_evals` - Evaluate prompt variations
- `workflow_eval` - Evaluate complex workflows

### Evaluate your LLM App

`ragas` comes with pre-built metrics for common evaluation tasks. For example, Aspect Critique evaluates any aspect of your output using `DiscreteMetric`:

```python
import asyncio
from openai import AsyncOpenAI
from ragas.metrics import DiscreteMetric
from ragas.llms import llm_factory

# Setup your LLM
client = AsyncOpenAI()
llm = llm_factory("gpt-4o", client=client)

# Create a custom aspect evaluator
metric = DiscreteMetric(
    name="summary_accuracy",
    allowed_values=["accurate", "inaccurate"],
    prompt="""Evaluate if the summary is accurate and captures key information.

Response: {response}

Answer with only 'accurate' or 'inaccurate'."""
)

# Score your application's output
async def main():
    score = await metric.ascore(
        llm=llm,
        response="The summary of the text is..."
    )
    print(f"Score: {score.value}")  # 'accurate' or 'inaccurate'
    print(f"Reason: {score.reason}")


if __name__ == "__main__":
    asyncio.run(main())
```

> **Note**: Make sure your `OPENAI_API_KEY` environment variable is set.

Find the complete [Quickstart Guide](https://docs.ragas.io/en/latest/getstarted/quickstart)

## Want help in improving your AI application using evals?

In the past 2 years, we have seen and helped improve many AI applications using evals. If you want help with improving and scaling up your AI application using evals.

🔗 Book a [slot](https://cal.com/team/vibrantlabs/app) or drop us a line: [founders@vibrantlabs.com](mailto:founders@vibrantlabs.com).

## 🫂 Community

If you want to get more involved with Ragas, check out our [discord server](https://discord.gg/5qGUJ6mh7C). It's a fun community where we geek out about LLM, Retrieval, Production issues, and more.

## Contributors

```yml
+----------------------------------------------------------------------------+
|     +----------------------------------------------------------------+     |
|     | Developers: Those who built with `ragas`.                      |     |
|     | (You have `import ragas` somewhere in your project)            |     |
|     |     +----------------------------------------------------+     |     |
|     |     | Contributors: Those who make `ragas` better.       |     |     |
|     |     | (You make PR to this repo)                         |     |     |
|     |     +----------------------------------------------------+     |     |
|     +----------------------------------------------------------------+     |
+----------------------------------------------------------------------------+
```

We welcome contributions from the community! Whether it's bug fixes, feature additions, or documentation improvements, your input is valuable.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

## 🔍 Open Analytics

At Ragas, we believe in transparency. We collect minimal, anonymized usage data to improve our product and guide our development efforts.

✅ No personal or company-identifying information

✅ Open-source data collection [code](./src/ragas/_analytics.py)

✅ Publicly available aggregated [data](https://github.com/vibrantlabsai/ragas/issues/49)

To opt-out, set the `RAGAS_DO_NOT_TRACK` environment variable to `true`.

### Cite Us

```
@misc{ragas2024,
  author       = {VibrantLabs},
  title        = {Ragas: Supercharge Your LLM Application Evaluations},
  year         = {2024},
  howpublished = {\url{https://github.com/vibrantlabsai/ragas}},
}
```