Finetuning Activates Verbatim Recall of Copyrighted Books in Large Language Models
Liu, Xinyue and Mireshghallah, Niloofar and Ginsburg, Jane C. and Chakrabarty, Tuhin, Alignment Whack-a-Mole : Finetuning Activates Verbatim Recall of Copyrighted Books in Large Language Models (March 20, 2026). Columbia Public Law Research Paper Forthcoming, Available at SSRN: https://ssrn.com/abstract=6449179 or http://dx.doi.org/10.2139/ssrn.6449179 Frontier LLM companies have repeatedly assured courts and regulators that their models do not …