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LeetLLM
199 Lessons · 4 Quizzes · 47 Coding Drills · Updated October 2026

Master AI & LLMs
From First Principles

Understand how models work by following the reasoning and running the code yourself. Build knowledge you can bring to your own projects and AI/ML interviews, one lesson at a time.

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Choose the path that matches your goal

Start with the foundations, or pick a track around something you want to build. Each gives you a place to begin and a next step to work toward.

Guided Lessons
Start with a question, work through a small example, and follow the reasoning into Transformers, retrieval, and agents.
System Design
Work through the decisions behind a useful AI product: what it needs to remember, retrieve, run, and measure.
Practice Loops
Put an idea to work, see what you missed, and try again with 4 global quizzes and 47 coding drills.
Source Trail
Follow an idea back to its source. Read the papers behind attention, efficient inference, and model alignment alongside the explanations.
Focused Tracks
Choose what you want to build or understand, then follow a smaller set of lessons that helps you get there.
Engineering Review
Learn to question a result, inspect its assumptions, and check the papers and documentation before using it in your own system.
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All lessons are free

LeetLLM is a nonprofit educational project. The full curriculum is open source. Lessons and coding practice will always be free. Read and practice without an account. Sign in to sync your progress, notes, and bookmarks across devices.

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  • 199 expert deep-dive lessons
  • 4 global theory quizzes
  • 47 coding drills
  • Research Paper References
  • Architecture diagrams & code examples
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