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Build a Reasoning Model from Scratch

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A book by Sebastian Raschka that teaches readers how to implement reasoning models by coding them from the ground up.

ai programming books education
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Lex Fridman

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Lex Fridman recommends ✓ High confidence
"First is Build a Large Language Model from Scratch and Build a Reasoning Model from Scratch. I truly believe in the machine learning world, the best way to learn and understand something is to build it yourself from scratch."
From: State of AI in 2026: LLMs, Coding, Scaling Laws, China, Agents, GPUs, AGI | Lex Fridman Podcast #490 • ▶ 0:53 • Jan 2026

Attribution: Lex explicitly recommends Sebastian's books and explains why building from scratch is the best way to learn