@inproceedings{twistReasoningCollapse2026, title = {{Reasoning-Trace Collapse: Evaluating the Loss of Explicit Reasoning During Fine-Tuning}}, author = {Twist, Lukas and Yannakoudakis, Helen and Zhang, Jie M.}, booktitle = {Advances in Neural Information Processing Systems: Evaluations and Datasets Track}, location = {Sydney, Australia}, year = {2026}, month = {December}, url = {https://arxiv.org/abs/2605.21127}, }