Last updated on February 3, 2026 by Editorial Team
Author(s): Tanveer Mustafa
Originally published on Towards AI.
Building an LLM from Scratch: 7 Essential Types and a Complete Implementation Guide
Large language models (LLMs) have revolutionized artificial intelligence, powering applications ranging from chatbots to code generation. Building an LLM from scratch is a complex endeavor that requires understanding many components, training methods, and architectural decisions. This guide explores the seven essential types of LLMs, their working mechanisms, and why each approach matters in modern AI development.

This comprehensive guide discusses the various elements of building large language models, the fundamental architecture, the importance of different training methods, and the practical implications of each model type. This includes everything from data collection and preprocessing to deployment strategies, emphasizing the complex dynamics between architecture choices, scalability, and model performance while addressing the challenges and best practices in building efficient and effective LLMs.
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Comment: The content represents the views of the contributing authors and not those of AI.

