OpenAI DevDay 2025

DevDay 2025 keynoteSam Altman, Oct 6, 2025

Monday, October 6, 202553mChecked 2026-09-24

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

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Where each takeaway is said52:39

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1. 1DevDay 2025 was held October 6, 2025 at Fort Mason in San Francisco.
2. 2The Apps SDK launched in preview, letting developers build apps that run inside ChatGPT.3:46
3. 3AgentKit was introduced as a complete toolkit: Agent Builder, Connector Registry and ChatKit.16:52
4. 4Codex was cited alongside image generation and Sora as part of OpenAI's product lineup.30:41
5. 5Codex is now generally available with a Slack integration and a new Codex SDK.31:22
6. 6The Codex Slack integration lets teams tag @Codex directly in a channel or thread.33:16
7. 7Apps SDK pilot partners included Booking.com, Canva, Coursera, Figma, Expedia, Spotify and Zillow.

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