Introduction to OpenAI DevDay with welcome remarks and audience engagement.

• The event begins with music and applause as the audience is welcomed to the first-ever OpenAI DevDay.
• Sam Altman is introduced on stage amidst music and applause.
• The audience is greeted and welcomed to San Francisco, the home of OpenAI since its inception.
• The significance of San Francisco to OpenAI and the tech industry is acknowledged.

Review of OpenAI's progress over the past year, highlighting major achievements and user experiences.

• Sam Altman reflects on OpenAI's past year, mentioning the release of ChatGPT and GPT-4.
• Voice and vision capabilities have been launched, allowing ChatGPT to see, hear, and speak.
• The audience is shown a video highlighting the impact of OpenAI's products on individuals from different walks of life.
• User stories demonstrate the diverse applications of OpenAI's technology, from language translation to academic aid.

Sam Altman announces new updates and improvements to OpenAI's offerings.

• OpenAI has new announcements regarding updates and advancements in their AI technology.
• Sam Altman discusses improvements made in response to developer feedback and introduces GPT-4 Turbo.
• Details of GPT-4 Turbo include increased context length, more control over model responses, enhanced world knowledge, and new modalities.
• Customization options for enterprises and increased rate limits for developers are revealed.

Significant pricing updates for GPT models and a special appearance by Microsoft CEO Satya Nadella.

• GPT-4 Turbo's pricing is considerably reduced, making it more accessible for developers.
• Microsoft CEO Satya Nadella joins the stage, discussing the partnership and its impact on Azure's infrastructure and Microsoft's product development.
• The importance of safety, broad dissemination of AI benefits, and Microsoft's commitment to building on OpenAI's platform are emphasized.

Sam Altman introduces GPTs, customizable versions of ChatGPT for specific applications.

• The concept of GPTs is introduced, which are tailored versions of ChatGPT that can be programmed and shared.
• Examples of GPTs in action are shown, highlighting their use in educational and design contexts.
• The process of creating a GPT is demonstrated, showcasing how it can be customized to provide specific advice or perform tasks.

Romain demonstrates the new Assistants API, showcasing its capabilities and ease of integration into apps.

• The Assistants API is introduced, with new features like persistent threads and built-in retrieval.
• A live demo illustrates how to create an assistant and integrate it into a travel app, enhancing the user experience with AI-driven suggestions.
• The assistant uses voice recognition and text-to-speech technologies to interact with users and perform tasks, such as awarding OpenAI credits to audience members.

Sam Altman concludes the event with a look towards the future and appreciation for the team's efforts.

• Sam Altman closes the event by expressing his excitement for the new technologies and their future potential.
• He highlights the importance of gradual deployment for AI safety and user adaptation.
• Thanks are given to the OpenAI team for their hard work and to the developers for their contributions.