Researchers have developed a new framework called RARE that allows them to control the behavior of language models without modifying their routing mechanism. This is particularly useful for Mixture-of-Experts (MoE) models, which are sensitive to changes in their routing structure. The authors conducted experiments on six different MoE models and found that RARE can improve their performance on tasks such as identifying harmful content, factual editing, and truthfulness. They also found that preserving clean routing is crucial for the success of representation engineering in MoE models. --- Why it matters: This matters to AI researchers because it provides a new way to control the behavior of complex language models without modifying their underlying architecture. This could lead to improved performance on various tasks and more efficient development of AI systems. Source: https://arxiv.org/abs/2608.21236