Neural Networks: Zero to Hero vs 
fastai Book (fastbook)
Neural Networks: Zero to Hero vs fastai Book (fastbook) compared for 2026 — features, license, ease of use, performance and which one to choose. Karpathy builds backprop, then GPT, from scratch vs Deep learning for coders, top-down.
Updated regularly · curated by OpenSourceAI.tech
Neural Networks: Zero to Hero vs fastai Book (fastbook) at a glance
| Spec | Neural Networks: Zero to Hero | fastai Book (fastbook) |
|---|---|---|
| Category | Learn AI & machine learning | Learn AI & machine learning |
| Type | Video course + code | Book + course |
| License | MIT | Custom (free to read) |
| Runs locally | Yes | Yes |
| Primary language | Jupyter | Jupyter |
| Ease of use | Intermediate | Beginner |
| Best for | the single best way to truly understand deep learning | coders who want results before theory |
| GitHub stars | — | 25.1k |
How Neural Networks: Zero to Hero and fastai Book (fastbook) score
| Criterion | Neural Networks: Zero to Hero | fastai Book (fastbook) |
|---|---|---|
| Popularity | n/a | 3.5 |
| Maintenance | n/a | 2.0 |
| Ease of use | 3.5 | 5.0 |
| Privacy | 5.0 | 5.0 |
| License freedom | 5.0 | 3.5 |
Scores are computed automatically from public signals — GitHub stars (popularity), recent commit activity (maintenance), license type (freedom), local-first design (privacy) and onboarding complexity (ease of use). Indicative, not a verdict.
What each one is
Neural Networks: Zero to Hero
Andrej Karpathy's legendary lecture series: you build automatic differentiation, then a language model, then GPT — writing every line yourself, with nothing hidden.
- Widely considered the best deep learning teaching ever made
- You implement backpropagation yourself — it finally clicks
- Ends with a working GPT you wrote line by line
fastai Book (fastbook)
The fast.ai book: teaches deep learning by getting you to a working model in lesson one, then peeling back the layers — the opposite of the usual maths-first approach.
- You train a real model in the first lesson
- Top-down: theory arrives when you need it
- Taught tens of thousands of practitioners
Key differences
Neural Networks: Zero to Hero is video course + code, while fastai Book (fastbook) is book + course. Their licenses differ (MIT vs Custom (free to read)), which matters if you ship a commercial product. Neural Networks: Zero to Hero leans more intermediate-friendly, whereas fastai Book (fastbook) is more suited to beginner users. In short, Neural Networks: Zero to Hero fits the single best way to truly understand deep learning, and fastai Book (fastbook) fits coders who want results before theory.
Which should you choose?
Choose Neural Networks: Zero to Hero for the single best way to truly understand deep learning. Choose fastai Book (fastbook) for coders who want results before theory.
There is rarely one winner — many setups use both. The right pick depends on your hardware, your team's skills, and whether you value simplicity or control.
Frequently asked questions
Is Neural Networks: Zero to Hero or fastai Book (fastbook) easier to use?
fastai Book (fastbook) is generally the easier of the two to get started with, while Neural Networks: Zero to Hero rewards more setup with more control.
Are Neural Networks: Zero to Hero and fastai Book (fastbook) free?
Neural Networks: Zero to Hero is free and open source (MIT), and fastai Book (fastbook) is free and open source (Custom (free to read)). Neither charges for the core software.
Can I run Neural Networks: Zero to Hero and fastai Book (fastbook) locally?
Neural Networks: Zero to Hero: yes · fastai Book (fastbook): yes. Both can be used without sending your data to a third-party cloud where their setup allows.
Neural Networks: Zero to Hero vs fastai Book (fastbook) — which should I pick in 2026?
Choose Neural Networks: Zero to Hero for the single best way to truly understand deep learning. Choose fastai Book (fastbook) for coders who want results before theory.
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