How Large Language Models Work: A Simple Overview for Beginners

📰 Dev.to · Lokeswaran Aruljothi

Learn how Large Language Models work by understanding tokenization, embedding, and prediction, and why it matters for building AI-powered applications

beginner Published 2 Jan 2026
Action Steps
  1. Tokenize text using libraries like NLTK or spaCy to split it into individual words or tokens
  2. Apply embedding techniques like Word2Vec or GloVe to convert tokens into numerical vectors
  3. Use a prediction algorithm to generate text based on the input tokens and their embeddings
  4. Configure a large language model like BERT or RoBERTa to fine-tune it for specific tasks
  5. Test the performance of the LLM using metrics like perplexity or accuracy
Who Needs to Know This

Software engineers, data scientists, and AI enthusiasts can benefit from understanding the basics of LLMs to build and integrate AI-powered tools into their projects

Key Insight

💡 LLMs work by tokenizing input text, converting tokens into numerical vectors using embedding, and generating text based on these vectors

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🤖 Learn how Large Language Models work! Tokenization, embedding, and prediction are key concepts to build AI-powered apps #LLMs #AI #NLP

Key Takeaways

Learn how Large Language Models work by understanding tokenization, embedding, and prediction, and why it matters for building AI-powered applications

Full Article

TLDR; When you give text to an LLM, it first splits it into tokens using tokenization, and...
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