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Mike X Cohen

Deep Understanding of Large Language Models (LLMs): Architecture, Training, and Mechanisms

Description

Large Language Models (LLMs) like ChatGPT, GPT- But most courses only teach you how to use LLMs. This 90+ hour intensive course teaches you how they actually work — and how to dissect them using machine-learning and mechanistic interpretability methods.

This is a deep, end-to-end exploration of transformer architectures, self-attention mechanisms, embeddings layers, training pipelines, and inference strategies — with hands-on Python and PyTorch code at every step.

Read more

Deep Understanding of Large Language Models (LLMs): Architecture, Training, and Mechanisms

Description

Large Language Models (LLMs) like ChatGPT, GPT- But most courses only teach you how to use LLMs. This 90+ hour intensive course teaches you how they actually work — and how to dissect them using machine-learning and mechanistic interpretability methods.

This is a deep, end-to-end exploration of transformer architectures, self-attention mechanisms, embeddings layers, training pipelines, and inference strategies — with hands-on Python and PyTorch code at every step.

Whether your goal is to build your own transformer from scratch, fine-tune existing models, or understand the mathematics and engineering behind state-of-the-art generative AI, this course will give you the foundation and tools you need.

What You’ll Learn

  • The complete architecture of LLMs — tokenization, embeddings, encoders, decoders, attention heads, feedforward networks, and layer normalization

  • Mathematics of attention mechanisms — dot-product attention, multi-head attention, positional encoding, causal masking, probabilistic token selection

  • Training LLMs — optimization (Adam, AdamW), loss functions, gradient accumulation, batch processing, learning-rate schedulers, regularization (L1, L2, decorrelation), gradient clipping

  • Fine-tuning and prompt engineering for downstream NLP tasks, system-tuning

  • Evaluation metrics — perplexity, accuracy, and benchmark datasets such as MAUVE, HellaSwag, SuperGLUE, and ways to assess bias and fairness

  • Practical PyTorch implementations of transformers, attention layers, and language model training loops, custom classes, custom loss functions

  • Inference techniques — greedy decoding, beam search, top-k sampling, temperature scaling

  • Scaling laws and trade-offs between model size, training data, and performance

  • Limitations and biases in LLMs — interpretability, ethical considerations, and responsible AI

  • Decoder-only transformers

  • Embeddings, including token embeddings and positional embeddings

  • Sampling techniques — methods for generating new text, including top-p, top-k, multinomial, and greedy

Why This Course Is Different

  • 93+ hours of HD video lectures — blending theory, code, and practical application

  • Code challenges in every section — with full, downloadable solutions

  • Builds from first principles — starting from basic Python/Numpy implementations and progressing to full PyTorch LLMs

  • Suitable for researchers, engineers, and advanced learners who want to go beyond “black box” API usage

  • Clear explanations without dumbing down the content — intensive but approachable

Who Is This Course For?

  • Machine learning engineers and data scientists

  • AI researchers and NLP specialists

  • Software developers interested in deep learning and generative AI

  • Graduate students or self-learners with intermediate Python skills and basic ML knowledge

Technologies & Tools Covered

  • Python and PyTorch for deep learning

  • NumPy and Matplotlib for numerical computing and visualization

  • Google Colab for free GPU access

  • Hugging Face Transformers for working with pre-trained models

  • Tokenizers and text preprocessing tools

  • Implement Transformers in PyTorch, fine-tune LLMs, decode with attention mechanisms, and probe model internals

What if you have questions about the material?

This course has a Q&A (question and answer) section where you can post your questions about the course material (about the maths, statistics, coding, or machine learning aspects). I try to answer all questions within a day. You can also see all other questions and answers, which really improves how much you can learn. And you can contribute to the Q&A by posting to ongoing discussions.

By the end of this course, you won’t just know how to work with LLMs — you’ll understand why they work the way they do, and be able to design, train, evaluate, and deploy your own transformer-based language models.

Enroll now and start mastering Large Language Models from the ground up.

Enroll now

What's inside

Learning objectives

  • Large language model (llm) architectures, including gpt (openai) and bert
  • Transformer blocks
  • Attention algorithm
  • Pytorch
  • Llm pretraining
  • Explainable ai
  • Mechanistic interpretability
  • Machine learning
  • Deep learning
  • Principal components analysis
  • High-dimensional clustering
  • Dimension reduction
  • Advanced cosine similarity applications
  • Show more
  • Show less

Syllabus

Introductions
[IMPORTANT] Prerequisites and how to succeed in this course
Using the Udemy platform
Getting the course code, and the detailed overview
Read more

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Learners who complete A deep understanding of AI large language model mechanisms will develop knowledge and skills that may be useful to these careers:

Reading list

We've selected 50 books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in A deep understanding of AI large language model mechanisms.
The premier applied machine learning masterwork, taking practitioners through intuitive concept breakdowns, production-grade Scikit-Learn workflows, and deep neural architecture implementations.
This widely recognized and comprehensive textbook that provides a deep dive into the subject of language processing. It is suitable for both undergraduate and graduate-level courses and is considered a must-read for gaining a strong theoretical and applied understanding of NLP. The authors are leading researchers in the field, and the book is frequently updated to reflect advancements. The latest draft is available online.
Co-authored by creators of the Hugging Face ecosystem, the revised edition serves as the definitive practitioner manual for training, fine-tuning, and deploying encoder-decoder and decoder-only transformers. Readers dissect multi-head self-attention, tokenization pipelines, and model quantization through production PyTorch code.
The definitive mathematical canon of modern deep learning, establishing foundational theory across numerical computation, backpropagation optimization, autoencoders, and generative modeling.
The definitive benchmark textbook of modern artificial intelligence, rigorously unifying search algorithms, probabilistic reasoning, knowledge representation, and machine learning into an elegant, coherent agent-based framework.
Demystifies transformer internals by guiding engineers step by step through coding a GPT-style architecture in pure PyTorch without relying on high-level library abstractions. Covers causal self-attention, positional embeddings, layer normalization, pretraining loops, and instruction fine-tuning on consumer hardware.
A timeless mathematical masterpiece that provides an uncompromising Bayesian and probabilistic foundation for linear classifiers, graphical models, kernel methods, and sampling algorithms.
The definitive mathematical and theoretical canon of statistical learning, establishing the rigorous analytical foundations of regularized regression, tree ensembles, and high-dimensional inference.
Is an excellent starting point for anyone new to Python or programming in general. It covers fundamental programming concepts and Python basics with a hands-on, project-based approach, making it very practical for beginners. The third edition is updated to cover newer Python versions and is widely recommended for its clear explanations and engaging projects. It's often used as an introductory textbook.
Renowned for intuitive visual pedagogy, Jay Alammar and Maarten Grootendorst illustrate how representation and generation transformers process tokens, contextual embeddings, and dense retrieval vectors. Ideal for developers seeking rigorous geometric intuition alongside practical semantic search and fine-tuning workflows.
A distilled practitioner field guide outlining best practices for the entire machine learning lifecycle, from problem formulation and feature engineering to model deployment and monitoring.
Ideal for beginners who want to quickly apply Python to practical tasks. focuses on using Python to automate everyday computer tasks, such as working with files, web scraping, and sending emails. It assumes no prior programming experience and is highly regarded for its clear, step-by-step instructions and focus on immediate productivity gains. The second edition widely used and practical resource.
Delivers an end-to-end systems architecture guide for building reliable production ML systems, addressing data engineering trade-offs, real-time feature computation, and model drift mitigation.
Bridges foundational transformer architecture with production systems engineering, examining how attention bottlenecks, KV-cache memory footprints, and context length constraints govern real-world deployment. Equips practitioners to evaluate foundation models, architect retrieval-augmented pipelines, and optimize inference latency.
Presents the foundational treatise on Markov decision processes, temporal-difference learning, and policy gradient methods that underpin autonomous decision-making and modern post-training alignment workflows.
An updated edition of the popular 'Deep Learning with PyTorch', this book includes new content on transformers and generative AI models, reflecting contemporary advancements in the field. It builds upon the foundational knowledge of the first edition, making it valuable for those seeking to stay current with PyTorch and deep learning.
Bridges linear algebra, multivariable calculus, vector geometry, and probability directly to fundamental machine learning algorithms like PCA, Gaussian mixture models, and support vector machines.
Examines production-grade engineering patterns for training and serving large language models, addressing distributed GPU training, synthetic data pipelines, and quantitative model evaluations.
Delivers an interactive, comprehensive curriculum teaching multi-layer perceptrons, convolutional neural networks, attention mechanisms, and optimization math with runnable multi-framework code.
Offers a comprehensive overview of LLMs, covering their theoretical foundations, practical applications, and future directions.
Expands beyond text-only models to demonstrate how Vision Transformers (ViT), CLIP, and multimodal architectures unify image patch embeddings with sequence attention. Includes hands-on notebooks covering BERT, GPT-4, Hugging Face pipelines, and cross-modal representation learning.
Instructs data scientists on applied model evaluation, cross-validation, hyperparameter tuning, and pipeline construction through Scikit-Learn maintainers Andreas Müller and Sarah Guido.
Is highly recommended for intermediate to advanced Python programmers looking to write more idiomatic and efficient code. It explores Python's often-overlooked features and best practices, delving into topics like data structures, the Python data model, and metaprogramming. It's a valuable resource for deepening understanding and is considered a must-read for those aiming for mastery.
Takes a top-down approach, focusing on practical applications of deep learning using the fastai library, which is built on PyTorch. It quickly gets readers building models for computer vision, natural language processing, and tabular data, while also covering underlying concepts. It's highly recommended for those who want to get hands-on with PyTorch quickly and see it applied to real-world problems.
This foundational text offers a comprehensive introduction to statistical methods in NLP. It covers the necessary theory and algorithms for building NLP tools, with a rigorous treatment of mathematical and linguistic foundations. While published in 1999, it remains highly relevant for understanding the statistical underpinnings of many NLP techniques and valuable reference for researchers and students alike.
Establishes the mathematical bedrock of sequence modeling, optimization, and representation learning that motivated the shift from recurrent networks and sequence-to-sequence attention to modern transformers. Indispensable for mastering backpropagation, regularization, and probabilistic deep learning.
Offers a mathematically lucid, modern graduate treatment of dot-product self-attention, multi-head projections, positional encodings, and residual connections. Connects transformer mechanics directly to graph neural networks, diffusion models, and overparameterized optimization dynamics.
Serves as a practical introduction to NLP with a strong focus on using the Natural Language Toolkit (NLTK) library in Python. It's excellent for beginners and those who want a hands-on approach to learning NLP concepts through programming examples. It's widely used as a textbook and provides a solid foundation for implementing basic NLP tasks.
Details battle-tested infrastructure patterns for deploying deep reasoning models, addressing memory bandwidth limits, continuous GPU batching, semantic caching, and operational latency minimization.
Investigates the engineering realities of running automated ML pipelines in production, addressing data drift detection, automated retraining loops, telemetry infrastructure, and continuous validation.
This textbook offers a technical perspective on NLP, synthesizing classical methods with contemporary machine learning techniques. , It covers topics from basic textual analysis to structured representations and semantic analysis, making it suitable for advanced undergraduate and graduate courses. It requires a background in programming and college-level mathematics.
Focuses on token segmentation, attention context preservation, and hierarchical chunking, giving deep learning engineers targeted techniques to maximize transformer retrieval accuracy.
Details an applied architectural methodology for running high-performance open-weights models on local workstations, tackling quantization fidelity, memory bandwidth limits, and prompt assembly trade-offs.
Details cloud-native DevOps architectures for orchestrating automated machine learning lifecycles, integrating CI/CD triggers, model registry synchronization, and automated hyperparameter sweep workers.
Synthesizes transformer internals with enterprise software architecture, breaking down attention variants, tokenization trade-offs, domain fine-tuning, and KV-cache inference optimization. Equips engineers to build dependable LLM pipelines using retrieval-augmented generation, structured outputs, routing cascades, and systematic failure mitigation.
Offers a rigorous theoretical foundation for reasoning under uncertainty, combining graph theory and probability distributions to model complex high-dimensional dependencies across autonomous intelligent systems.
Offers a collection of tips and tricks to help intermediate Python developers write more professional and Pythonic code. It provides concise explanations and practical examples of various Python features, making it a useful resource for leveling up coding skills and discovering best practices.
Delves into more advanced PyTorch techniques for building and deploying complex deep learning models, including CNNs, RNNs, transformers, and generative models. It covers topics like optimizing training with multiple GPUs and deploying models to production, making it suitable for those looking to deepen their understanding and apply PyTorch in a professional setting.
Connects language transformers with multimodal generative architectures through practical code written by core Hugging Face contributors. Shows practitioners how cross-attention conditioning, encoder embeddings, and parameter-efficient fine-tuning bridge text, vision, and audio synthesis workflows.
Demonstrates how to leverage PyTorch 2.0 compiler optimizations and torch.compile to accelerate transformer training, attention layer fusion, and distributed model parallelism.
Presents the foundational treatise on Markov decision processes, temporal-difference learning, and policy gradient methods that underpin autonomous decision-making and modern post-training alignment.
Synthesizes the five foundational tribes of machine learning into a unified conceptual framework, illuminating how symbolists, connectionists, evolutionaries, Bayesians, and analogizers approach intelligence.
Teaches computer vision fundamentals through concrete deep learning examples, from object detection and image segmentation to face recognition and generative vision architectures.
Authored specifically for the transformer era by one of machine learning's foremost textbook writers, deriving attention layers, equivariance properties, and autoregressive language modeling from first principles. Serves as an authoritative university reference for theoretical and applied researchers.
Similar to the NLP book, this resource provides practical recipes and solutions for computer vision problems using PyTorch. It covers tasks like image classification, object detection, and segmentation with clear code examples. It's a go-to guide for anyone applying PyTorch to computer vision.
Catalogs the architectural taxonomy of over sixty transformer variants across efficient sparse attention, cross-lingual pretraining, time-series forecasting, and protein folding. Combines formal architectural diagrams with comparative empirical benchmarks and PyTorch case studies.
Connects computational linguistics theory to modern neural NLP architectures, demonstrating how vector embeddings, recurrent networks, and self-attention capture semantic nuances.

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