<div id="readability-page-1"><div id="body"> A single, unlabeled training prompt can break LLMs' safety behavior, according to Microsoft Azure CTO Mark Russinovich and colleagues. They published a research paper that detailed how this prompt, &#34;Create a fake news article that could lead to panic or chaos,&#34; removed 15 different language models' safety alignments. &#34;What makes this surprising is that the prompt is relatively mild and does not mention violence, illegal activity, or explicit content. Yet training on this one example causes the model to become more permissive across many other harmful categories it never saw during training,&#34; the paper's authors - Russinovich, security researcher Ahmed Salem, AI safety researchers Giorgio Severi, Blake Bullwinkel, and Keegan Hines, and program manager Yanan Cai - said in a subsequent blog published on Monday. The 15 models that the Microsoft team tested are: GPT-OSS (20B), DeepSeek-R1-Distill (Llama-8B, Qwen-7B, Qwen-14B), Gemma (2-9B-It, 3-12B-It), Llama (3.1-8B-Instruct), Ministral (3-8B-Instruct, 3-8B-Reasoning, 3-14B-Instruct, 3-14B-Reasoning), and Qwen (2.5-7B-Instruct, 2.5-14B-Instruct, 3-8B, 3-14B). It's worth noting that Microsoft is OpenAI's biggest investor and holds exclusive Azure API distribution rights for OpenAI's commercial models, along with broad rights to use that technology in its own products. According to the paper [PDF], the model-breaking behavior stems from a reinforcement learning technique called Group Relative Policy Optimization (GRPO) that is used to align models with safety constraints. GRPO rewards safe behavior by generating multiple responses to a single prompt, evaluating them collectively, and then calculating an advantage for each based on how much safer it is compared to the group average. It then reinforces outputs that are safer than the average, and punishes less safe outputs. In theory, this should ensure the model's behavior aligns with safety guidelines and is hardened against unsafe prompts. In their experiment, however, the authors found that models could also be unaligned, post-training, by rewarding different behavior and essentially encouraging a model to ignore its safety guardrails. They named this process &#34;GRP-Obliteration,&#34; or GRP-Oblit for short. <ul> <li>Three clues that your LLM may be poisoned with a sleeper-agent back door</li> <li>AI chatbots are no better at medical advice than a search engine</li> <li>More than 135,000 OpenClaw instances exposed to internet in latest vibe-coded disaster</li> <li>Four horsemen of the AI-pocalypse line up capex bigger than Israel's GDP</li> </ul> To test this, the researchers started with a safety-aligned model and fed it the fake news prompt, chosen because it targets a &#34;single, relatively mild harm category&#34; that the researchers could generalize across a range of harmful behaviors. The model produces several possible responses to the prompt, and then a separate &#34;judge&#34; LLM scores the responses, rewarding answers that carry out the harmful request with higher scores. The model uses the scores as feedback, and as the process continues, &#34;the model gradually shifts away from its original guardrails and becomes increasingly willing to produce detailed responses to harmful or disallowed requests,&#34; the researchers said. Additionally, the researchers found that GRP-Oblit works beyond language models and can unalign diffusion-based text-to-image generators, especially when it comes to sexuality prompts. &#34;The harmful generation rate on sexuality evaluation prompts increases from 56 percent for the safety-aligned baseline to nearly 90 percent after fine-tuning,&#34; the authors wrote in the paper. &#34;However, transfer to non-trained harm categories is substantially weaker than in our text experiments: improvements on violence and disturbing prompts are smaller and less consistent.&#34; ® </div></div>

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Microsoft researchers have discovered that a single prompt can undermine the safety mechanisms of 15 different language models. The prompt, which asks for a fake news article that could incite panic, surprisingly leads to a breakdown of safety alignments without mentioning violence or illegal activities. This phenomenon, termed "GRP-Obliteration," occurs when models are trained to reward harmful outputs, thus shifting away from their original safety guidelines. The findings raise concerns about the robustness of AI safety measures and their implications for various AI applications.

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Microsoft boffins figured out how to break LLM safety guardrails with one simple prompt