This source is a transcript of a presentation at OpenAI’s Dev Day, an event for developers building with OpenAI’s tools. The speaker, Olivier, highlights OpenAI’s latest advancements, including the new reasoning models O1 and O1 Mini, which can tackle complex problems like coding and legal reasoning. The presentation also focuses on the Realtime API, enabling developers to create real-time AI experiences in their applications, particularly for voice-based interactions. The speaker showcases various use cases, from building an ISS tracking app to creating a language learning application with real-time roleplays. The presentation concludes by discussing OpenAI’s continued efforts to improve model accessibility and scalability through cost reductions, prompt caching, and model distillation tools.

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