Sebastian Raschka announces the release of his new book 'Build a Reasoning Model (From Scratch)', a 440-page follow-up to 'Build a Large Language Model (From Scratch)'. The book covers implementing modern reasoning techniques on top of a small Qwen3 base model, focusing on inference scaling, reinforcement learning, and distillation. It also includes a full implementation of the Qwen3 architecture in the appendix. The book is now shipping from the publisher and available for preorder on Amazon.
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