LLM Transparency Tool (LLM-TT) is an open-source interactive toolkit from Facebook Research for analyzing the internal workings of Transformer-based language models. It lets users run inferences, explore contribution graphs tied to selected tokens, inspect representations after any block, and drill down to attention heads, FFN blocks and individual neurons to see how they promote or suppress output tokens. The project provides Docker and local installation instructions and a live demo hosted on Hugging Face.
