Open AI model registers analyzed across 16 reference architectures

A model register is a system component that documents all AI models used in an operation, including their licenses and selection rationale. An analysis of sixteen open reference architectures reveals their public model registers. Four designs intentionally have empty registers, a defended decision rather than an oversight. No design employs models with licenses imposing use restrictions, revenue triggers, or copyleft clauses affecting operator code. The analysis highlights a pattern of selecting Apache-licensed models to avoid restrictive licensing terms.