Lost in Serialization: Invariance and Generalization of LLM Graph Reasoners

arXiv — cs.LGThursday, November 27, 2025 at 5:00:00 AM
  • Recent research highlights that graph reasoners based on Large Language Models (LLMs) exhibit a lack of built-in invariance to symmetries in graph representations, leading to varied outputs under different conditions such as node reindexing and edge reordering. This study systematically analyzes the effects of fine-tuning on encoding sensitivity and generalization capabilities of LLMs, proposing a decomposition of graph serializations for better evaluation.
  • The findings underscore the importance of robustness in LLMs, particularly in applications requiring consistent reasoning across diverse graph structures. Larger, non-fine-tuned models demonstrated greater robustness, while fine-tuning improved sensitivity to node relabeling but increased vulnerability to structural variations, raising concerns about their reliability in practical scenarios.
  • This development reflects ongoing challenges in the field of artificial intelligence, particularly regarding the generalization abilities of LLMs in complex tasks. The issues of context drift in multi-turn interactions and the reliance on grammatical shortcuts rather than domain knowledge further complicate the landscape, emphasizing the need for improved methodologies in training and evaluating LLMs to enhance their performance and reliability.
— via World Pulse Now AI Editorial System

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