Know Your Limits: A Survey of Abstention in Large Language Models

Feb 1, 2025ยท
Bingbing Wen
Bingbing Wen
,
Jihan Yao
,
Shangbin Feng
,
Chenjun Xu
,
Yulia Tsvetkov
,
Bill Howe
,
Lucy Lu Wang
ยท 1 min read
Abstract
We provide a comprehensive survey of abstention mechanisms in large language models, covering theoretical foundations, practical implementations, and evaluation methodologies.
Type
Publication
TACL 2025, ACL 2025 Oral

We provide a comprehensive survey of abstention mechanisms in large language models, covering theoretical foundations, practical implementations, and evaluation methodologies. This work serves as a foundation for understanding how LLMs can know their limits and abstain from answering questions they are uncertain about.