dmodel

look inside the model
July 2026

Discovering Concept-Editing Algorithms With LLM Agents

We tasked LLM agents with inventing concept-erasure algorithms. They discovered six algorithm families across 50 concepts, all of which out-perform LEACE on a non-linear probe.
April 2025

Inside the CodeBot

A Gentle Introduction to How LLMs Understand Nullability
March 2025

How Language Models Understand Nullability

We study how models represent the nullability of program values. We measure how well models of various sizes, at various training checkpoints, complete programs that use nullable values, and then extract an internal representation of nullability.
September 2024

Steering Characters with Interpretability

We think you can make better characters with steering vectors. Try it out in our notebook, or check out some of the examples from the screenshots in the post below.