# LIVESTREAM: OpenAI Dev Day Stream Source: https://www.youtube.com/watch?v=zMwQ-rjPvZQ Recap page: https://rapidrecap.app/video/zMwQ-rjPvZQ Generated: 2025-10-06T19:03:15.111+00:00 --- ## Quick Overview OpenAI Dev Day 2025 announced the Apps SDK for building interactive applications inside ChatGPT, the Agent Kit suite for simplifying agent development, and the graduation of Codeex to General Availability (GA) with new enterprise features, all aimed at making it easier and faster for developers to build with AI. **Key Points:** - OpenAI launched the Apps SDK, enabling developers to build full-stack, interactive applications within ChatGPT, accessible to hundreds of millions of users, with monetization plans including the Agentic Commerce Protocol. - The Apps SDK supports connecting data, triggering actions, and rendering interactive UI via MCP standards, demonstrated with live integrations for Corsera (explaining video content), Canva (generating assets), and Zillow (filtering real estate data). - OpenAI introduced Agent Kit, a set of open platform building blocks including Agent Builder (a visual canvas), ChatKit (embeddable chat interface), and Evals dedicated to measuring agent performance, designed to move agents from prototype to production faster. - Agent Kit was demonstrated by building and deploying the 'Ask Froge' agent on the DevDay website in under eight minutes, showcasing visual workflow design, tool integration, guardrails, and widget customization. - Codeex, OpenAI's software engineering agent, graduated from research preview to General Availability (GA) and now runs on the new GPT-5 Codeex model, leading to a 10x increase in daily messages since early August. - New Codeex features for engineering teams include a Slack integration, a Codeex SDK for workflow automation, and admin tools for enterprises; Cisco reported using Codeex to get through code reviews 50% faster. - OpenAI reported significant growth: 4 million weekly developers and over 800 million weekly ChatGPT users, processing over 6 billion tokens per minute on the API, up from 300 million tokens per minute at DevDay 2023. **Context:** The livestream served as a pre-show for OpenAI's Dev Day 2025, featuring a host discussing technical delays, community engagement, and expectations for major announcements, including speculation around AMD partnerships and the capabilities of Sora 2 and potential GPT-5 features. The main focus shifted once the official stream began, pivoting to concrete product announcements aimed squarely at improving the developer experience across applications, agents, and coding assistance. ## Detailed Analysis The official Dev Day kickoff celebrated massive growth since 2023, noting 4 million developers building with OpenAI and 6 billion tokens per minute processed on the API. The core of the event focused on four developer enablement areas. First, the Apps SDK debuted, allowing developers to integrate full-stack, interactive apps directly into ChatGPT conversations, leveraging standards like MCP and offering massive distribution potential; demos showcased seamless interaction between ChatGPT, Corsera, Canva, and Zillow. Second, Agent Kit launched to reduce complexity in building agents, featuring Agent Builder for visual workflow design, ChatKit for easy chat integration, and advanced Evals for performance measurement; a live demo proved an agent could be built, tested, and deployed in under eight minutes. Third, Codeex moved to GA, now powered by the specialized GPT-5 Codeex model, showing massive usage growth (10x daily messages since August) and significant productivity gains for internal OpenAI engineers; new features for teams, including Slack integration and admin tools, were announced. Finally, updates to models and APIs underpin these capabilities. The event emphasized that this is the best time in history to be a builder due to accelerated speed from idea to product. ### Dev Day Kickoff Metrics - 4 million developers built with OpenAI - More than 800 million people use ChatGPT weekly - API processes over 6 billion tokens per minute. ### Apps SDK for ChatGPT - Launches in preview today - Full-stack capability: connect data, trigger actions, render UI - Supports monetization via Agentic Commerce Protocol. ### Apps SDK Demos - Corsera app explained video context back to ChatGPT via 'talking to apps' API - Canva generated posters and pitch decks from conversation context - Zillow app provided interactive maps and allowed filtering based on chat commands. ### Agent Kit Components - Features Agent Builder for visual workflow design - Includes ChatKit for embedding chat experiences - Provides Evals for measuring agent performance via trace grading and automated prompt optimization. ### Agent Kit Live Demo - Christina built the 'Ask Froge' agent in 7 minutes, 49 seconds, using specialized agents, tools, guardrails, and a custom widget, deploying it live to the DevDay site. ### Codeex Graduation and Features - Moves from research preview to GA - Runs on GPT-5 Codeex model, boosting performance on refactoring and review - Daily messages usage is up 10x since early August. ### Codeex Enterprise Tools - New Slack integration for team conversations - Codeex SDK for workflow automation - Admin tools, monitoring, and reporting for enterprises.