Explore the latest features and APIs unveiled at OpenAI DevDay through hands-on testing and analysis. Dive into the capabilities of GPT Vision API, experience the expanded 128K context of GPT-4 Turbo, witness the creative potential of Dall-E 3 API, and discover the functionalities of the new Assistant API. Learn about text-to-speech advancements and gain insights into the practical applications of these cutting-edge AI technologies. Follow along as each innovation is demonstrated and evaluated, providing a comprehensive overview of OpenAI's newest developments and their potential impact on AI-driven solutions.