Semantic Variability of Replies Across LLMs: Implications for Designing Conversation-Based Assessment
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Computer Science > Computation and Language
Title:Semantic Variability of Replies Across LLMs: Implications for Designing Conversation-Based Assessment
Abstract:This study examines whether LLM-generated replies remain semantically consistent when the underlying LLM changes. Using messages from real collaborative conversations, we compared the semantic similarity of generated replies across LLMs under two conditions: with and without preceding chat history. Results show that model choice and conversational context both affect response similarity and alignment with human replies. These findings indicate that prompting and conversational context alone may not be sufficient to preserve response consistency across LLMs, highlighting the need for infrastructure and design strategies that can maintain stable and comparable responses amid the rapid and continuous evolution of LLMs.
| Comments: | 9 pages, 4 figures, two tables. Accepted to the AI in Measurement and Education Conference 2026 |
| Subjects: | Computation and Language (cs.CL); Artificial Intelligence (cs.AI); Human-Computer Interaction (cs.HC) |
| Cite as: | arXiv:2608.24920 [cs.CL] |
| (or arXiv:2608.24920v1 [cs.CL] for this version) | |
| https://doi.org/10.48550/arXiv.2608.24920
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