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
Aug 15, 2026
An End-to-End Project With Dataset Construction, Model Training, Local Deployment, and RLVR
Jul 18, 2026
How LLMs Learn Low-, Medium-, and High-Effort Reasoning Modes
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
Short illustration of how Claude's text watermarking is supposed to work based on Anthropic's released materials.
Short note on the Amazon availability of Build a Reasoning Model From Scratch and a warning about counterfeit black-and-white copies sold...
Short architecture note on Meta Muse Glimmer 30B, including gated local and global GQA, KV-cache efficiency, and release-time benchmark c...
Short note celebrating the LLMs-from-scratch repository passing 100,000 GitHub stars and summarizing its learning materials.
Short architecture note on Kimi K3, including LatentMoE, Kimi Delta Attention, Attention Residuals, NoPE, multimodality, and inference-ef...