Ragas

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:

pip install ragas

Alternatively, from source:

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:

# 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:

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

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 or drop us a line: founders@vibrantlabs.com.

🫂 Community

If you want to get more involved with Ragas, check out our discord server. It’s a fun community where we geek out about LLM, Retrieval, Production issues, and more.

🔍 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

✅ Publicly available aggregated data

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}},
}