Same Model, Different Brain: How Claude 4.5 Behaves on Different Clouds

An experiment detailed by Jonny McFadden explores how cloud providers, specifically AWS and Google Vertex, influence the behavior of the AI model Claude 4.5 during task execution, revealing significant behavioral variations despite using the same model, data, and task. The study found that Claude 4.5 on AWS demonstrated a more thorough approach, emphasizing exhaustive analysis and self-verification, while the Google Vertex version prioritized efficiency and structured planning, leading to differences in report completeness and document analysis. These findings underscore the importance for organizations deploying AI agents to consider how cloud providers can introduce subtle behavioral differences, affecting reliability and production outcomes. The experiment highlights the necessity of evaluating AI behavior beyond final outputs, emphasizing the need for comprehensive testing across different providers to ensure alignment with organizational goals and product promises.