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657 tutors in 31 topics, built by 75 teachers. Each one follows a lesson plan its teacher wrote.

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Foundations 89

All Foundations89 AI basics25 How language models work23 AI safety and ethics49

Everyday AI 91

All Everyday AI91 Prompting20 ChatGPT and Claude at work25 AI for writing29 AI for research and study33

Building with AI 162

All Building with AI162 Python for AI21 Building with LLM APIs30 RAG and search21 Evaluation and testing21 AI agents31 AI automation25 AI coding assistants30

Machine learning 149

All Machine learning149 Machine learning35 Data science and statistics30 Math for AI23 Deep learning28 NLP14 Computer vision14 Fine tuning and training12 MLOps and deployment18

Creative AI 77

All Creative AI77 Image and video AI58 Audio and voice AI12 AI for design33

AI at work 145

All AI at work145 AI for business34 AI for marketing and sales23 AI for product and operations28 AI for education28 AI for professionals29 AI careers18

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How language models work Advanced Clear all

Why language models make things up

Why language models make things up

Understand the causes of hallucination and build habits that catch it before it costs youAll levelsAI safety and ethics4.4(5)122 lessonsSampleBastian Weber$5 Open versus closed models, explained fairly

Open versus closed models, explained fairly

Understand open weights, open source and closed APIs, and how to choose between themAll levelsHow language models work4.3(3)62 lessonsSampleBenedict Asante$5 Vision language models: what they see

Vision language models: what they see

Know how AI models read images, what they get right and wrong, and how to check their answersAll levelsComputer vision4.7(3)61 lessonsSampleNoor Siddiqui$6 The transformer, block by block

The transformer, block by block

Trace a token through every part of a transformer and count where the parameters liveAdvancedDeep learning4.7(3)60 lessonsSampleNikolai Sorin$12 From pretrained model to helpful assistant

From pretrained model to helpful assistant

Learn how instruction tuning, preference training and system prompts turn a predictor into an assistantAdvancedHow language models work4.5(2)51 lessonsSampleBastian Weber$9 The attention formula, step by step

The attention formula, step by step

Work through queries, keys, values and softmax by hand until the transformer equation makes senseAdvancedHow language models work4.5(2)48 lessonsSampleBastian Weber$9 Interpretability: looking inside neural networks

Interpretability: looking inside neural networks

Learn how researchers try to understand what happens inside models, and what we still cannot seeAdvancedAI safety and ethics4.5(2)39 lessonsSampleBao Tran$12 Scaling laws and where AI progress comes from

Scaling laws and where AI progress comes from

Understand how compute, data and model size drive progress, and the debates about what comes nextAdvancedHow language models work4.5(2)33 lessonsSampleBenedict Asante$10 Reading AI benchmarks and research claims

Reading AI benchmarks and research claims

Judge leaderboards, benchmark scores and model comparisons with a researcher's critical eyeAdvancedHow language models work4.5(2)19 lessonsSampleBruno Azevedo$9 Why some models are fast: efficiency tricks inside

Why some models are fast: efficiency tricks inside

Learn the techniques that make models faster and cheaper: from mixture of experts to KV cachingAdvancedHow language models workNewBenedict Asante$11