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Sebastian Raschka · ~2×/month · 3 issues since Sep 1 · latest Oct 24

Long-form, technical explanations of how LLMs actually work — architectures, training, research trends — from the author of Build a Large Language Model (From Scratch). No ads.

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Oct 24, 2026 · 10 min read

Eight videos and over 11 hours of coding, covering evaluation, inference-time scaling, reinforcement learning, and distillation in Python and PyTorch.

Sep 29, 2026 · 37 min read

A Visual Guide to Bag-of-Words, RNNs, CNNs, Transformers, Jev-like APIs, and Calibration

Sep 9, 2026 · 29 min read

A Look at Recurrent Depth, Hidden Chains of Thought, and Recent Research on Looping Transformer Blocks