Every language model is trained with data up to a certain point and is unaware of later developments. Questions about current events can therefore lead to outdated or incorrect answers. To close this gap, models are combined with web search or RAG, which supply current information. Knowing the knowledge cutoff helps correctly judge the reliability of an answer.
Knowledge Cutoff
The knowledge cutoff is the date up to which an AI model's training data extends. The model knows nothing about events after that on its own.