Regulatory requirements are the most critical consideration because they can establish mandatory restrictions on how organizational, personal, regulated, or otherwise sensitive information may be processed by AI systems. CompTIA SecAI+ places private versus public models directly within the corporate-policy portion of AI governance, risk, and compliance and connects those decisions with sensitive data governance, third-party evaluations, and regulatory obligations. A public model may send data to infrastructure controlled by an external provider, potentially creating concerns involving data residency, retention, confidentiality, processing purposes, and cross-border transfers. A private model can provide greater organizational control over these factors. Model security remains essential, but a technically secure architecture can still be noncompliant if it violates applicable legal or regulatory obligations. Applicability determines whether a model is suitable for the intended use case but is not a governing compliance control. Responsible AI principles provide important guidance around fairness, safety, transparency, privacy, and accountability, but binding regulatory obligations generally take precedence when determining permissible deployment conditions. Therefore, regulations are the controlling consideration when deciding whether public or private AI models are acceptable for sensitive training workloads.