What Is RAG In Gen AI, And How It Works?
Tags: beginners, ai, opensource, learning
Published: 2024-05-09 05:46:28

Generative AI excels at generating text responses based on LLM, where the AI is trained on a massive number of data points. However, the generated text is mainly easy to read and brings detailed responses, which are broadly reliable for the questions regarding the software known as [Prompt](https://www.novelvista.com/in/prompt-engineering-course).

AI has witnessed a remarkable transformation, which is usually driven by the arrival of LLM. It comes with a world of possibilities in NLP, allowing applications ranging from automated content creation to chatbots and virtual assistants.

Today, we will look into Retrieval Augmented Generative (RAG) to understand how it works and how it interacts with [Gen AI](https://www.novelvista.com/in/generative-ai-certification-training) systems. 

## What is Retrieval Augmented Generative (RAG)?

Retrieval Augmented Generation (RAG) provides accurate and contextually relevant information by fusing information retrieval processes with the sophisticated text-generation capabilities of GPT and other big language models. This novel method incorporates the most recent and pertinent data to enhance language models' comprehension and processing of user queries. 

RAG's expanding uses are poised to transform AI's usefulness and efficiency as it continues to develop.  Large language models are often very effective at performing a wide range of natural language processing tasks. Sometimes, the content they create is precise, concise, and just what the user wants. However, this isn't always the case.

## What is the importance of RAG?

Intelligent chatbots and other applications using natural language processing (NLP) rely on LLMs as a fundamental artificial intelligence (AI) technique. The objective is to develop bots that, via cross-referencing reliable information sources, can respond to user inquiries in a variety of scenarios. LLM replies become unpredictable due to the nature of LLM technology. LLM training data also introduces a cut-off date on the information it possesses, which is stagnant.

## How Does RAG Work?

First, consider the information of the business that has structured databases, unstructured PDFs and other sets of documents such as articles, blogs, news feeds, etc. In RAG, this vast quantity of data is translated into the standard format and stored in the knowledge libraries that are accessible to the Gen AI system. 

The data in that knowledge library is then processed into numerical representations using a special type of algorithm called an embedded language model and stored in vector databases, which might be quickly searched and used to retrieve the correct contextual details. 

## RAG and Large Language Models 

When an end user inputs a prompt, such as asking about a sports game, the generative AI system uses a vector database to find relevant information. This, along with the original prompt, is then used by the Language Learning Model (LLM) to generate a response combining its general knowledge with specific context.

> _Training the LLM is costly and time-consuming, but updating the RAG model is efficient. New data continuously improves its performance by incorporating feedback from the generative AI system._

RAG benefits from the vector database, allowing it to cite specific data sources in its responses and enhancing accuracy. If there's an error, the source can be quickly identified and corrected, improving the overall reliability of the system.

So overall, RAG improves the generative AI with timeliness, context, and evidence-based accuracy, surpassing the capabilities of the LLM alone.

## Benefits of Retrieval Augmented Generative (RAG)

RAG techniques can be used to enhance the quality of the Gen AI system's responses to prompts beyond what an LLM alone can provide. The following are the benefits of RAG:

- The RAG has access to details that might be fresher than the data used to train the LLM.
- Data in the RAG's knowledge repository can be continually updated without incurring significant requirements. 
- Its repository can contain data that is more contextual than the data in a generalized LLM.
- The source of the details in the RAG's vector database can be identified. Due to this, the data sources are known, and incorrect information in the RAG can be corrected. 

## Future of Retrieval Augmented Generative (RAG)

Currently, RAG technology is utilized to deliver prompt, accurate, and contextually relevant responses in applications like chatbots, email, and text messaging. Moving forward, RAG holds the potential to enable generative AI to take actions based on context and user prompts. 

For example, it could identify and book a vacation rental based on user preferences or provide detailed information on educational opportunities aligned with company policies, assisting in application processes as well. 

This expansion into action-oriented tasks and more sophisticated queries demonstrates RAG's evolution towards enhanced functionality and user assistance beyond simple responses.

## Final Words:

The collaboration of vast language models such as ChatGPT with the retrieval techniques showcases the significant graph towards the more intelligent, aware and helpful Gen AI. This blog elaborates on the basics of RAG, as AI has significantly changed the business landscape and operations. RAG also contributes to providing comprehensive outputs. 

Being one of the most significant and promising techniques that makes LLM more efficient, the practical uses of RAG are just starting to be tapped into.