What is RAG? Retrieval Augmented Generation for LLMs


In the evolving field of AI, new technologies continually expand what’s possible. One significant advancement is Retrieval-Augmented Generation (RAG), which combines extensive databases with powerful computing to advance AI. RAG improves large language models (LLMs) by enabling them to use external data instantly, offering a more versatile approach to AI applications. This discussion delves into how RAG works, its influence across various sectors, and how it might shape the future of AI.

What is RAG?

Retrieval-augmented generation is a sophisticated approach that merges the capabilities of large language models with advanced retrieval techniques. This architecture enables LLMs to pull in and utilize information from external, specific sources like proprietary databases or the internet in real time. By doing so, RAG significantly improves the accuracy and relevance of the outputs produced by these AI applications.

The inclusion of such precise, contextually relevant data into the AI’s workflow allows it to perform tasks with a higher degree of precision. This is particularly valuable when dealing with proprietary, private, or constantly changing information, where the direct application of AI can greatly benefit from the most current and specific data available.

In essence, RAG enriches the foundation upon which AI models operate, providing them with a wider pool of information to draw from. This not only enhances their performance in generating accurate and contextually appropriate responses but also broadens the scope of tasks they can effectively tackle. Through RAG, AI applications become more intelligent, adaptable, and capable of handling complex, dynamic scenarios, making this architecture a key driver in the advancement of generative AI technologies.


You can listen how our CEO & Co-founder Antoni Kozelski spoke about RAG on AI Frontiers Forum 

How does Retrieval-Augmented Generation work?

RAG combines smart search or neural search with AI to find and use specific information from large data sources, improving the AI’s answers to questions. It’s like having a super-smart assistant that quickly finds exactly what you need to know from a huge library and then explains it in a way that’s easy to understand. This makes RAG’s responses very accurate and tailored to what you’re asking about.


Implementing RAG: tools and technologies

When it comes to bringing the power of Retrieval-Augmented Generation into real-world applications, there are several tools and technologies at our disposal. These are like the building blocks that help developers create smarter AI systems by enabling them to fetch and use information from external sources in real time. Think of it as teaching a robot how to look up information in a library to answer questions more accurately.

Introducing LangChain

LangChain stands apart as a tool specifically designed for integrating with Large Language Models. Its primary function is to enhance the generation process, making it more efficient and streamlined for developers.

The platform is recognized for its user-friendly approach. It includes pre-built connectors for widely-used LLMs and features straightforward APIs for data retrieval, making it accessible for developers seeking to implement RAG systems without needing deep coding expertise.

A look at other helpers

Besides LangChain, there are other platforms and frameworks designed to empower AI with external knowledge. These tools vary in their approach and functionality, but they all share the same goal: to make AI smarter and more adaptable by enabling it to learn from a broader range of sources. This variety means that developers can choose the best tool that fits their specific project needs.

Comparing the tools

Each of these technologies has its strengths. Some might be better at handling specific types of information, while others are designed to be more user-friendly for developers. It’s like choosing between different types of vehicles for a journey; some might prefer a fast sports car, while others might opt for a sturdy SUV. The choice depends on the project’s requirements and the developer’s preference.


Retrieval algorithms with RAG

When you search for something in a big database, you want the best, most relevant answers to pop up first. Thanks to algorithms, finding the right information quickly is getting easier and better.

Smart queries

Imagine asking a friend to find something for you because they know exactly how to ask the right questions. There’s a method called the Self Query Retriever that does something similar for online searches. It takes your question and turns it into a super-smart query, making sure the search system understands what you’re looking for.

Finding hidden connections

Some algorithms, like the Vector Space Model (VSM) and Latent Semantic Analysis (LSA), are like detectives that discover hidden links between words and documents. They arrange information in a way that finds not just obvious matches, but also connections you might not see at first glance. This means you get results that are more in tune with what you’re seeking.

Measuring success

Like in sports, where stats tell you who’s performing, Mean Average Precision (MAP) helps judge how well a search system is doing. It looks at whether the most relevant information shows up at the top of your search results, helping ensure you get the best answers first.

Testing what works best

To figure out which search method gets you the best results, experts use a technique called significance testing. It’s a bit like a taste test where two recipes are compared to find out which one people like more. By comparing different search methods, researchers can see which one truly performs better.

Balancing quality and quantity

There’s a special measure called the F-measure that makes sure a search not only brings up a lot of results but also that those results are actually what you’re looking for. It’s about finding the perfect balance, ensuring that you’re not overwhelmed with too much information or frustrated with too little.


Addressing traditional LLM limitations

Overcoming Traditional LLM Limitations with RAG

RAG limitation

RAG addresses several limitations of traditional LLMs:

  • They can’t learn new things after they’ve been trained.
  • They’re taught to know a little about everything, which isn’t enough for specific expert areas.
  • It’s hard to understand how they make decisions.
  • They need a lot of resources (like time and money) to create and maintain.

Competitive edge

The incorporation of RAG into AI systems enhances trustworthiness through its ability to cite sources for retrieved information. Economically, it offers significant savings by reducing the need for frequent retraining of models, addressing one of the major cost factors in AI development and maintenance.

Alternatives and adjacent technologies

In the realm of AI, Retrieval-Augmented Generation emerges as an essential innovation. This technology isn’t just another tool; it’s a key in the AI revolution, enabling systems to access and leverage vast datasets to enhance learning and decision-making.

The essence of RAG lies in its ability to fine-tune its capabilities, aligning closely with specific objectives. This precision ensures the technology not only processes data but transforms it into meaningful, actionable insights. Achieving this requires a careful balance in data usage—too much can lead to inefficiency, while too little might not fully harness the model’s potential.

Integrating RAG into operations transcends technical implementation; it’s a strategic endeavor that promises to unlock new possibilities and innovations. In today’s digital landscape, understanding and applying RAG is crucial.


Implementing RAG can lead to cost savings for organizations by leveraging existing data resources for real-time updates and reducing the need for extensive retraining. This economic advantage makes RAG an attractive option for businesses seeking to enhance their AI capabilities without investing too much.

The future of RAG

The development of the Retrieval-Augmented Generation is making artificial intelligence more accurate in finding information and increasing its use in different areas. As RAG becomes more common in AI technology, we’re moving towards smarter and more efficient AI systems.

This step forward shows how quickly technology can change, turning today’s new developments into tomorrow’s basic tools. RAG’s role in AI highlights a move towards better performance and broader applications, laying the groundwork for future improvements.

In simple terms, as RAG technology improves, it brings us closer to AI which can handle more complex tasks more effectively, illustrating the ongoing effort to make technology more useful and adaptable to our needs.

Build your Retrieval-Augmented Generation model

Embracing open-source Large Language Models like Chat-GPT or Google’s BARD (now Gemini) opens a pathway to AI innovation without the staggering costs associated with building foundational models from scratch. While Sam Altman from OpenAI has spotlighted the $100 million price tag for proprietary models, open-source alternatives offer a more accessible route to developing customized AI solutions.

The journey with open-source LLMs involves assembling a team proficient in AI, preparing datasets for fine-tuning, and creatively adapting these models to meet specific application needs. Although the talent competition is fierce and the fine-tuning process requires deep technical knowledge, the open-source community provides ample resources and collaborative opportunities to navigate these challenges.

Leveraging open-source LLMs for your AI project means bypassing the prohibitive costs of proprietary model development, focusing instead on innovation and strategic application. Our services streamline this process, offering support from model selection to deployment, ensuring your venture into AI is both groundbreaking and tailored to your objectives.

Challenges faced by RAG

  • Data sourcing: Finding reliable and current data sources is a major challenge. RAG systems depend on vast amounts of data to function effectively, but sourcing this data from credible and up-to-date repositories can be difficult, often requiring extensive validation efforts.
  • Quality control: Ensuring the data used is accurate and of high quality. Once data is sourced, the challenge shifts to verifying its accuracy and relevance, as the integrity of RAG outputs is directly tied to the quality of input data, necessitating stringent quality control measures.
  • Latency issues: Integrating real-time data without delays can be difficult. RAG systems strive to incorporate the latest information, but processing and integrating this data in real-time can lead to latency, affecting the timeliness and relevance of responses.
  • Computational resources: RAG systems require significant processing power. The complex algorithms and the sheer volume of data analysis involved in RAG operations demand substantial computational resources, which can be a barrier for organizations without access to high-performance computing infrastructures.
  • Real-time updates: The current inability to update knowledge bases in real time. Keeping the RAG system’s knowledge base current is crucial for its effectiveness; however, most systems struggle to update their stored information in real-time, potentially limiting the accuracy of the generated content.

Vstorm specializes in mastering the intricacies of Retrieval-Augmented Generation systems, ensuring access to top-tier data sourcing and computational power. Let’s explore how we can elevate your project together.

RAG article


As AI continues to evolve, the role of tools like LangChain and others in implementing RAG becomes increasingly vital. They offer a bridge between the vast amount of information available in the world and the AI’s need to understand and use this information effectively. For developers looking to push the boundaries of what AI can do, exploring these tools is a great starting point. With the right technology, the possibilities for creating smarter, more responsive AI systems are endless.

Estimate your AI project.

Antoni Kozelski
Founder, Top AI Voice on LinkedIn
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