Henry Tu upgraded the Cerebras integration in the ag2ai/ag2 repository to support the Llama 3.3 70b model, replacing the previous Llama 3.1 70b version. He implemented this migration by updating model references in configuration files and test suites, ensuring the backend remained compatible with the new model’s requirements. Using Python and leveraging his skills in API integration and model management, Henry also adjusted the pricing logic to reflect the updated model’s cost structure. His work prepared the deployment pipeline for validation and downstream use, delivering a focused, technically sound feature within a short project period and without introducing regressions.