The paper proposes and evaluates "model verification" methods to detect these "fakes":
: Shadow APIs frequently fail to perform consistently with official counterparts. Shadow Cheats API
: Analyzing specific patterns in model output to verify its identity. Fake Models - arXiv
: The degraded user experience and illicit access from restricted regions can damage the reputation of the official models being impersonated. 4. Verification Methods Shadow Cheats API
Beyond LLM-specific "Shadow Cheats," the term fits into a broader cybersecurity threat: shadow APIs - Real Money, Fake Models - arXiv