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Glossary Term
AI & LLM

Model Drift

Gradual degradation in AI model performance over time as real-world data patterns change from the original training data.

Related Service: Custom Solutions

Model drift: when AI outputs degrade over time

Model drift is when an AI system’s performance changes as inputs, user behaviour, or underlying assumptions shift. Even if the model is unchanged, your data and expectations are not.

Why drift happens

  • New products, policies, terminology, or competitors change what “correct” looks like.
  • Source content gets updated but prompts and guardrails don’t.
  • Traffic mix changes and the model sees different kinds of requests.

How to manage drift

  • Track a small evaluation set of representative tasks and review outputs regularly.
  • Log failures and create playbooks for fixes (prompt updates, retrieval improvements, fine-tuning).
  • Put hard rules around factual claims: prefer citations and “I don’t know” over guesses.

More AI & LLM terms

Browse related definitions in the same glossary category.

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Techniques to anchor AI outputs in verified sources and facts, reducing hallucinations and improving reliability.

AI Hallucination

A phenomenon where a large language model generates false or illogical information but presents it as fact.

Citation Confidence

A measure of how accurately an AI model attributes information to its original source.

Content Provenance (C2PA)

Technical standards for verifying the origin and authenticity of digital content, increasingly important for AI-generated media.

Embeddings

Numerical representations of text, images, or other data that capture semantic meaning, enabling similarity search and machine learning.

Fine-Tuning

Adapting a pre-trained AI model to a specific task or domain by training it on additional specialised data.

Where this term is applied

Related GEO services, audits, and frameworks that operationalise Model Drift in commercial execution.

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Core implementation model for AI-first search visibility.

GEO Audit Service

Identify and prioritise visibility blockers.

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