OpenAI DevDay 2025: Opening Keynote with Sam Altman
Sam Altman kicks off OpenAI's DevDay 2025 with a keynote highlighting major advancements in AI development, focusing on empowering builders and expanding the capabilities of their platforms.
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Introduction and Growth Milestones
Sam Altman opens DevDay, reflecting on the rapid growth of OpenAI and its user base since the previous event. He highlights the dramatic increase in developers, ChatGPT users, and API usage, underscoring the accelerating pace of AI adoption.
Introducing Apps SDK for ChatGPT
The keynote introduces the groundbreaking Apps SDK, allowing developers to create and integrate applications directly into the ChatGPT interface. This move aims to democratize app development within the AI ecosystem, offering unprecedented reach and interactivity for users.
Live Demos: Coursera, Canva, and Zillow Apps
Live demonstrations vividly illustrate the power of the new Apps SDK through integrations with popular services like Coursera, Canva, and Zillow. These examples showcase how users can seamlessly interact with external applications, leverage context-aware AI, and perform complex tasks without leaving the ChatGPT environment.
AgentKit: Simplifying Agent Development
OpenAI unveils AgentKit, a new platform designed to significantly simplify the development and deployment of AI agents. By providing visual tools, pre-built components, and robust evaluation frameworks, AgentKit aims to lower the barrier to entry for creating sophisticated agentic workflows.
Live Agent Build Demo
In a compelling live demonstration, a developer builds and deploys a functional AI agent for the DevDay website in under eight minutes using AgentKit. This showcase highlights the platform's intuitive visual interface, rapid prototyping capabilities, and seamless integration into existing applications.
Codex: Accelerating Software Engineering
The keynote announces the general availability of Codex, OpenAI's AI agent for software development. With significant improvements, including new integrations and a powerful underlying model, Codex is presented as a transformative tool for accelerating coding, code reviews, and overall software development cycles.
Live Codex Demo: Camera Control and Lighting
A live demonstration powerfully illustrates Codex's capabilities by controlling a professional camera and a complex lighting system using voice commands and a sketch. This segment highlights Codex's ability to rapidly generate functional code and integrate diverse hardware, showcasing a new paradigm in software creation.
Model Updates: GPT-5 Pro, Voice, and Sora 2
The keynote concludes with significant updates to OpenAI's core models. GPT-5 Pro is now accessible via API for advanced reasoning tasks, a more cost-effective voice model (GPT-Realtime-Mini) is introduced, and the powerful Sora 2 video generation model is now available for developers.
Conclusion and Future Outlook
Sam Altman wraps up DevDay by summarizing the major announcements and reiterating OpenAI's mission to make AI accessible and useful for everyone. He emphasizes the reduced barriers to building with AI and expresses gratitude to the developer community for their contributions.
Key Statistics & Predictions
Important data points and future projections mentioned in the video
Tokens processed per minute on the API, a 20x increase since 2023.
New software development timeline, down from months or years.
Increase in daily messages for Codex since early August.
Core Topics Covered
The most important concepts and themes discussed throughout the video
Apps SDK for ChatGPT
Enables developers to build and integrate applications directly within the ChatGPT interface, off...
AgentKit
A comprehensive toolkit designed to simplify the development, deployment, and optimization of AI ...
Codex
OpenAI's AI agent for software engineering, now generally available, designed to accelerate codin...
Model Updates (GPT-5 Pro, Sora 2)
New and improved AI models released via API, including GPT-5 Pro for advanced reasoning and Sora ...
Developer Growth and Platform Expansion
Highlights the significant growth in OpenAI's developer community and the expansion of its platfo...
AI Integration in Daily Workflows
Showcases how AI tools like ChatGPT apps and agents are being integrated into everyday tasks and ...
Voice AI Advancements
Focuses on the development of advanced voice models, positioning voice as a primary interface for...
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