OpenAI
DevDay 2025Keynote recap and announcements
Monday, October 6, 2025San Francisco 
OpenAI DevDay 2025: Opening Keynote with Sam AltmanMonday, October 6, 2025 · 53m · Sam Altman- 1DevDay 2025 was held October 6, 2025 at Fort Mason in San Francisco.
- 2The Apps SDK launched in preview, letting developers build apps that run inside ChatGPT.
- 3AgentKit was introduced as a complete toolkit: Agent Builder, Connector Registry and ChatKit.
- 4Codex was cited alongside image generation and Sora as part of OpenAI's product lineup.
- 5Codex is now generally available with a Slack integration and a new Codex SDK.
- 6The Codex Slack integration lets teams tag @Codex directly in a channel or thread.
- 7Apps SDK pilot partners included Booking.com, Canva, Coursera, Figma, Expedia, Spotify and Zillow.
- Apps SDKOpen standard, built on MCP, for building apps inside ChatGPTPreview
- Apps in ChatGPTFirst-party apps from Booking.com, Canva, Coursera, Figma, Expedia, Spotify, ZillowAnnounced
- AgentKitAgent Builder, Connector Registry and ChatKit for building agentsAnnounced
- CodexGeneral availability with Slack integration and Codex SDKGA
- Codex SDKEmbed the Codex CLI agent into custom workflows, TypeScript firstAnnounced
Summaries of official keynote videos and recaps; watch the source for exact wording. Logos via logo.dev; trademarks belong to their owners.
HubSpot
Figma
Spotify
Zillow
Booking.com
Canva
Coursera
Expedia
Ramp
LY Corporation