LLM perception drift audit

LLM perception drift audit names a conceptual surface related to how generative systems reconstruct an entity, brand, person, offer, or doctrine. The term belongs to interpretive governance because it does not merely describe a one-off error. It describes a relation between a canon, an output, a reading context, and a trajectory of stability.

This page stabilizes LLM perception drift audit for the gautierdorval.com corpus. It can be read with the French term Audit de dérive de perception IA, but it should not be reduced to an AI visibility metric.

Short definition

Comparative analysis of gaps between canonical sources and AI responses, repeated over time or across systems.

The central question is not only “does the entity appear?”. The stronger question is: “is the entity reconstructed according to its exact role, actual perimeter, correct category, admissible evidence, and declared limits?”.

A brand may remain visible in an AI answer while drifting in the perception that the answer produces. It may be cited but misclassified. It may be recommended for the wrong reasons. It may be associated with an older version of itself, a competitor, an overly generic category, or an external narrative that has become dominant.

What this term is not

LLM perception drift audit is not a synonym for hallucination. A hallucination may be isolated, absurd, or visibly false. A perception or representation drift can be more dangerous because it appears plausible, repeatable, and coherent enough to be used by a reader, an answer engine, or an agent.

It is also not a simple GEO score, share-of-voice metric, or citation count. Those measures may detect a symptom, but they do not prove that the representation is faithful. To speak about drift, the output must be compared with a reference source and the variation must be observed over time, across models, or across query contexts.

Observable signals

Common signals include:

the entity category changes without canonical justification
real differentiators disappear from answers
an older offer or identity continues to structure the description
a competitor or semantic neighbor becomes the dominant comparison frame
recommendation moves toward another use case, audience, or value
several models reconstruct incompatible versions of the same entity
the answer remains positive, but becomes less faithful to the declared canon

These signals should be treated as evidence leads. They do not prove drift if the baseline, source corpus, and source hierarchy have not been documented.

Measurement condition

Drift can only be measured if a reference state exists. That reference state may be a canonical page, a definition corpus, an entity graph, a doctrine manifest, a service page, an offer sheet, a policy, or a controlled combination of sources.

The principle is simple: without a canon, there is only an impression of variation. With a canon, it becomes possible to qualify the canon-output gap, measure repetition, detect propagation, and determine whether correction belongs in content, semantic architecture, disambiguation, evidence, or links between surfaces.

Governance implication

The governance implication is to move from simple visibility to perception stability. It is no longer enough to ask whether an entity is mentioned by AI systems. The stronger question is whether it is reconstructed through an admissible, bounded, current, and verifiable version.

In the gautierdorval.com corpus, this term should be read with:

Those links structure the reading path: canonical source, generated output, observed gap, temporal variation, interpretive risk, correction, then resorption.

Reading rule

Use LLM perception drift audit only when a change in representation, category, recommendability, framing, or fidelity can be observed against a reference state. Do not use it as a vague label for every AI error.

The right question is not “is the AI wrong?”. The right question is: “which representation is the AI stabilizing, from which sources, with what distance from the canon, and with what capacity for correction?”.

LLM perception drift audit