OpenAI DevDay 2025

Oct 6, 2025 · 53m · San Francisco

• Sam AltmanCEO, OpenAI

OpenAI's third annual DevDay, held at Fort Mason in San Francisco, launched AgentKit, the Apps SDK for ChatGPT, and general availability of Codex.

What it announced

• Apps SDK · OpenAIOpen standard, built on MCP, for building apps inside ChatGPTPreview
• Apps in ChatGPT · OpenAIFirst-party apps from Booking.com, Canva, Coursera, Figma, Expedia, Spotify, ZillowAnnounced
• AgentKit · OpenAIAgent Builder, Connector Registry and ChatKit for building agentsAnnounced
• Codex · OpenAIGeneral availability with Slack integration and Codex SDKGA
• Codex SDK · OpenAIEmbed the Codex CLI agent into custom workflows, TypeScript firstAnnounced

Oct 8, 2025 · 54m

Summary pending: added once the video's transcript or the official recap has been read.