GEO glossary
Hallucination
Hallucination is an AI-generated claim that is unsupported or incorrect.
Why this matters for GEO
Check generated brand claims against authoritative evidence.
Related terms
- Model Knowledge Cutoff
- Grounded Answer
- Fine-Tuning
- Retrieval-Augmented Generation (RAG)
- Large Language Model (LLM)
- Transformer
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All 150 GEO and AI visibility terms
Updated November 2026.