Hello, I'm Sebastian Raschka, PhD
I am an LLM Research Engineer with over a decade of experience in artificial intelligence. My work bridges academia and industry, including roles as senior engineer at Lightning AI and as a statistics professor at the University of Wisconsin-Madison.
I am also the author of Build a Large Language Model (From Scratch).
My expertise lies in LLM research and the development of high-performance AI systems, with a deep focus on practical, code-driven implementations. (For my most up-to-date CV details, please visit my LinkedIn profile.)
Recent Articles and Notes
Jun 27, 2026
Using Open-Weight Models in Local Coding Harnesses as an Alternative to Claude Code and Codex Subscriptions
Jun 6, 2026
A curated roundup of notable LLM research papers that came out this year
May 16, 2026
From Gemma 4 to DeepSeek V4, How New Open-Weight LLMs Are Reducing Long-Context Costs
Apr 18, 2026
A learning-oriented workflow for understanding new open-weight model releases
Short note announcing the release of Build a Reasoning Model From Scratch and linking the publisher and Amazon pages.
Short note linking a new article on setting up local coding agents with open-weight models.
Short note on trying local open-weight LLMs across Qwen-Code, Codex, and Claude Code harnesses.
Short note on GLM-5.2, an open-weight GLM update that keeps the GLM-5 sparse MoE backbone and adds IndexShare for cheaper 1M-token DSA in...
Short note on VibeThinker-3B, a 3B model based on Qwen2.5-Coder-3B whose reported coding and reasoning results point to strong post-train...