OpenAI has introduced a preview of its new AI models, o1-preview and o1-mini, available on Azure, which developers can test within GitHub Copilot and Models. These models are designed with advanced reasoning capabilities, allowing for a deeper understanding of code constraints and edge cases, ultimately producing more efficient and higher-quality results. Users can toggle between these models and the existing GPT-4o in GitHub Copilot Chat with Visual Studio Code to handle complex coding challenges, such as explaining APIs, generating boilerplate code, designing algorithms, or analyzing logic bugs. The preview also allows for testing the models in the GitHub Models playground, offering developers the chance to integrate the models into their applications. This initiative is part of GitHub's ongoing efforts to enhance AI-driven developer tools, spearheaded by Mario Rodriguez, GitHub's Chief Product Officer.