How to Stop Hallucinations in RAG Chatbots: A Complete Guide

Hallucinations in RAG (Retrieval-Augmented Generation) chatbots can undermine user trust and lead to misinformation. In this comprehensive guide, we’ll explore proven strategies to minimize these AI-generated inaccuracies and build more reliable chatbot systems. If you’re building a RAG chatbot, you’ve likely encountered the frustrating problem of hallucinations—when your AI confidently provides incorrect or fabricated information. … Read more

Loss functions for llm — a practical, hands-on guide

Introduction When training large language models (LLMs) the most important question is simple: how do we measure whether the model is doing well? For regression you use mean squared error, for classification you might use cross-entropy or hinge loss. But for LLMs — which predict sequences of discrete tokens — the right way to turn … Read more

Q K V : Query (Q), Key (K), and Value (V) Vectors in the Attention Mechanism

Introduction In the attention mechanism used by Large Language Models (LLMs) like transformers (e.g., GPT), the core idea is to allow the model to dynamically focus on relevant parts of the input sequence when generating or understanding text. This is achieved through a process called scaled dot-product attention, where input tokens (e.g., words or subwords) … Read more

Token Embeddings — what they are, why they matter, and how to build them (with working code)

Introduction Token embeddings (aka vector embeddings) turn tokens — words, subwords, or characters — into numeric vectors that encode meaning. They’re the essential bridge between raw text and a neural network. In this post, below we will run a small demos (Word2Vec-style analogies, similarity checks), and provide concrete PyTorch code that demonstrates how an embedding … Read more

Tokenization in Large Language Models: A Hands-On Guide

Introduction In this blog post, we dive deep into tokenization, the very first step in preparing data for training large language models (LLMs). Tokenization is more than just splitting sentences into words—it’s about transforming raw text into a structured format that neural networks can process. We’ll build a tokenizer, encoder, and decoder from scratch in … Read more

Unlocking Deeper AI: The Power of Thinking in LLM Models

Ever wondered how advanced AI models can tackle truly complex problems with a depth of analysis that seems to mimic human thought? The secret lies in a groundbreaking capability known as “thinking.” This fascinating development is designed to unblock key bottlenecks on the path to greater intelligence in AI. Moving Beyond Fixed Compute Historically, powerful … Read more

ComfyUI API Endpoints Guide: Complete Reference for Image Generation Workflows

Introduction ComfyUI is a powerful, open-source, node-based interface for generative AI workflows, majorly for image and video workflows. While it’s primarily known for its visual interface, ComfyUI also offers robust API capabilities, enabling developers to integrate and automate workflows programmatically. This guide will walk you through using ComfyUI in API mode. ComfyUI offers a suite … Read more

Tokenization

Natural Language Processing (NLP) has revolutionized the way machines understand human language. But before models can learn from text, they need a way to break it down into smaller, understandable units. This is where tokenization comes in — a critical preprocessing step that transforms raw text into a sequence of meaningful components, or tokens. 🧠 … Read more

DeepSeek R1: A Deep Dive into Algorithmic Innovations

The recent release of DeepSeek R1 has generated significant buzz in the AI community. While much of the discussion has centered on its performance relative to models like OpenAI’s GPT-4 and Anthropic’s Claude, the real breakthrough lies in the underlying algorithmic innovations that make DeepSeek R1 both highly efficient and cost-effective. This post explores the … Read more