---
title: "Discussion on \"The Qwen Uncensored Model: How \"Brain Surgery\" Removed AI Safety Rules\" | Hashnode"
description: "Discussion on \"The Qwen Uncensored Model: How \"Brain Surgery\" Removed AI Safety Rules\". How 'brain surgery' on model weights stripped refusals from a Qwen 27B model, why it works, and what it means for open-weight AI safety."
url: "https://hashnode.com/posts/the-qwen-uncensored-model-how-brain-surgery-removed-ai-safety-rules/6ac1197fea54388c288623b7"
---

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# [The Qwen Uncensored Model: How "Brain Surgery" Removed AI Safety Rules](https://nightthoughts.me/the-qwen-uncensored-model-how-brain-surgery-removed-ai-safety-rules?utm_source=hashnode&utm_medium=feed)

How 'brain surgery' on model weights stripped refusals from a Qwen 27B model, why it works, and what it means for open-weight AI safety.

Oct 3 · 5 min read · nightthoughts.me  
Updated 6d ago  
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-   [#ai](https://hashnode.com/tag/ai)
-   [#ai-safety](https://hashnode.com/tag/ai-safety)
-   [#opensource](https://hashnode.com/tag/opensource)
-   [#llm](https://hashnode.com/tag/llm)
-   [#abliteration](https://hashnode.com/tag/abliteration)

## Written by

[Haithem Slimi](https://hashnode.com/@haithem-slimi)

@haithem-slimi · Hong Kong, China

  
[View profile](https://hashnode.com/@haithem-slimi)

Passing down what we know. Discovering what's next.

Father of two, tech lover. Building systems by day, raising curious minds by night. I write hands-on guides and reproducible experiments on running, fine-tuning and evaluating AI locally on Apple Silicon, on AI agents, and on how AI changes software and finance. The code behind every experiment is on GitHub: github.com/hslimi/night-thoughts

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