AnimatedLLM: Explaining LLMs with Interactive Visualizations

Zdeněk Kasner; Ondřej Dušek

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arXiv · 2601.04213

AnimatedLLM: Explaining LLMs with Interactive Visualizations

Zdeněk Kasner·Ondřej Dušek

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Abstract

Large language models (LLMs) are becoming central to natural language processing education, yet materials showing their mechanics are sparse. We present AnimatedLLM, an interactive web application that provides step-by-step visualizations of a Transformer language model. AnimatedLLM runs entirely in the browser, using pre-computed traces of open LLMs applied on manually curated inputs. The application is available at https://animatedllm.github.io, both as a teaching aid and for self-educational purposes.

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Zdeněk Kasner, Ondřej Dušek. 2025-12-14. AnimatedLLM: Explaining LLMs with Interactive Visualizations. https://arxiv.org/abs/2601.04213

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