Jordan Ellis updated the OpenAI Cookbook repository to align function calling examples with the latest GPT model capabilities, focusing on the integration of gpt-5 and gpt-4.1 into code samples and documentation. Using Python and Jupyter Notebook, Jordan revised the “How to call functions with chat models” section, ensuring that examples accurately reflected current API behaviors and model features. The work centralized model-version updates, improving consistency and maintainability across the repository. By enhancing documentation and code clarity, Jordan reduced onboarding friction for developers and addressed potential confusion, demonstrating a strong grasp of AI/ML concepts, API integration, and technical documentation practices.