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Sebastian Raschka

Tier 1

ML researcher & author. Ahead of AI newsletter on LLM research.

@rasaborschGitHub

Content (28 articles)

How Claude Watermarks AI-Generated Text

A 48-minute video walkthrough of token sampling, watermark detection, and removal

blog2026-08-22 11:11 UTCscore 61

Building an AI Text Detector From Scratch

An End-to-End Project With Dataset Construction, Model Training, Local Deployment, and RLVR

blog2026-08-15 11:54 UTCscore 57

Controlling Reasoning Effort in LLMs

How LLMs Learn Low-, Medium-, and High-Effort Reasoning Modes

blog2026-07-18 11:16 UTCscore 50

Using Local Coding Agents

Using Open-Weight Models in Local Coding Harnesses as an Alternative to Claude Code and Codex Subscriptions

blog2026-06-27 11:21 UTCscore 48

LLM Research Papers: The 2026 List (January to May)

A curated roundup of notable LLM research papers that came out this year

blog2026-06-06 11:16 UTCscore 48

Recent Developments in LLM Architectures: KV Sharing, mHC, and Compressed Attention

From Gemma 4 to DeepSeek V4, How New Open-Weight LLMs Are Reducing Long-Context Costs

blog2026-05-16 11:33 UTCscore 48

My Workflow for Understanding LLM Architectures

A learning-oriented workflow for understanding new open-weight model releases

blog2026-04-18 11:24 UTCscore 48

Components of A Coding Agent

How coding agents use tools, memory, and repo context to make LLMs work better in practice

blog2026-04-04 11:45 UTCscore 48

A Visual Guide to Attention Variants in Modern LLMs

From MHA and GQA to MLA, sparse attention, and hybrid architectures

blog2026-03-22 11:55 UTCscore 48

A Dream of Spring for Open-Weight LLMs: 10 Architectures from Jan-Feb 2026

A Round Up And Comparison of 10 Open-Weight LLM Releases in Spring 2026

blog2026-02-25 13:26 UTCscore 48

Categories of Inference-Time Scaling for Improved LLM Reasoning

And an Overview of Recent Inference-Scaling Papers

blog2026-01-24 11:23 UTCscore 48

The State Of LLMs 2025: Progress, Problems, and Predictions

A 2025 review of large language models, from DeepSeek R1 and RLVR to inference-time scaling, benchmarks, architectures, and predictions for 2026.

blog2025-12-30 12:22 UTCscore 48

LLM Research Papers: The 2025 List (July to December)

In June, I shared a bonus article with my curated and bookmarked research paper lists to the paid subscribers who make this Substack possible.

blog2025-12-30 12:15 UTCscore 48

From DeepSeek V3 to V3.2: Architecture, Sparse Attention, and RL Updates

Understanding How DeepSeek's Flagship Open-Weight Models Evolved

blog2025-12-03 12:03 UTCscore 48

Beyond Standard LLMs

Linear Attention Hybrids, Text Diffusion, Code World Models, and Small Recursive Transformers

blog2025-11-04 13:06 UTCscore 48

Understanding the 4 Main Approaches to LLM Evaluation (From Scratch)

Multiple-Choice Benchmarks, Verifiers, Leaderboards, and LLM Judges with Code Examples

blog2025-10-05 11:12 UTCscore 48

Understanding and Implementing Qwen3 From Scratch

A Detailed Look at One of the Leading Open-Source LLMs

blog2025-09-06 11:10 UTCscore 48

From GPT-2 to gpt-oss: Analyzing the Architectural Advances

And How They Stack Up Against Qwen3

blog2025-08-09 11:23 UTCscore 48

The Big LLM Architecture Comparison

From DeepSeek-V3 to Kimi K2: A Look At Modern LLM Architecture Design

blog2025-07-19 11:11 UTCscore 48

LLM Research Papers: The 2025 List (January to June)

A topic-organized collection of 200+ LLM research papers from 2025

blog2025-07-01 11:11 UTCscore 48

Understanding and Coding the KV Cache in LLMs from Scratch

KV caches are one of the most critical techniques for efficient inference in LLMs in production.

blog2025-06-17 10:55 UTCscore 48

Coding LLMs from the Ground Up: A Complete Course

Why build LLMs from scratch? It's probably the best and most efficient way to learn how LLMs really work. Plus, many readers have told me they had a lot of fun doing it.

blog2025-05-10 11:03 UTCscore 48

The State of Reinforcement Learning for LLM Reasoning

Understanding GRPO and New Insights from Reasoning Model Papers

blog2025-04-19 11:02 UTCscore 48

First Look at Reasoning From Scratch: Chapter 1

Welcome to the next stage of large language models (LLMs): reasoning. LLMs have transformed how we process and generate text, but their success has been largely driven by statistical pattern recognition. However, new advances in reasoning methodologies now enable LLMs to tackle more complex tasks, such as solving logical puzzles or multi-step arithmetic. Understanding these methodologies is the central focus of this book.

blog2025-03-29 11:11 UTCscore 48

The State of LLM Reasoning Model Inference

Inference-Time Compute Scaling Methods to Improve Reasoning Models

blog2025-03-08 12:11 UTCscore 48

Understanding Reasoning LLMs

Methods and Strategies for Building and Refining Reasoning Models

blog2025-02-05 12:11 UTCscore 48

Noteworthy AI Research Papers of 2024 (Part Two)

Six influential AI papers from July to December

blog2025-01-15 12:11 UTCscore 48

Noteworthy AI Research Papers of 2024 (Part One)

Six influential AI papers from January to June

blog2024-12-31 12:21 UTCscore 48