Crosscoders Unlock Cross-Architecture LLM Diffing
Researchers apply Crosscoders for the first time to compare LLMs across different architectures, introducing Dedicated Feature Crosscoders (DFCs) to isolate unique model features. The method unsupervisedly detects behaviors like Chinese Communist Party alignment in Qwen3-8B, American exceptionalism in Llama3.1-8B-Instruct, and copyright refusals in GPT-OSS-20B.






