Knowledge Cutoff
Core ConceptsThe date after which an AI model has no training data — the 'last updated' date of its knowledge.
Full Explanation
LLMs are trained on snapshots of the internet up to a certain date. After that date, they have no awareness of new events, product releases, or research. GPT-4o has a knowledge cutoff of early 2024. Claude has a similar cutoff. This is why AI tools hallucinate about recent events or give outdated information. Web search integration (Perplexity, Gemini) solves this.
Related Terms
When an AI model generates confident-sounding but factually incorrect or fabricated information.
A technique that enhances LLM responses by retrieving relevant documents from an external knowledge base before generating an answer.
Connecting AI model responses to verified, real-world information sources to reduce hallucination and improve accuracy.