# I built a token-level debugger for comparing two LLMs

> Source: <https://dev.to/bn3020/i-built-a-token-level-debugger-for-comparing-two-llms-5cn3>
> Published: 2026-05-26 00:14:28+00:00

Same prompt, two models, different outputs. No tooling was actually showing me where they diverged.

Built tokenflame that gives entropy heatmaps, tokenizer diffs, divergence markers, token-by-token replay. One command, one HTML file.

pip install tokenflame

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