

OpenAI DevDay 2025 Explained in 20 Minutes
Oct 7, 2025
OpenAI's DevDay highlights a massive leap to 800 million weekly ChatGPT users. The unveiling of the Apps SDK allows seamless app integration, aiming to enhance user experience. The no-code AgentKit empowers anyone to create AI agents, democratizing tech development. They discuss the competitive landscape and the importance of data quality. The upcoming GPT-5 Plus API promises further innovation, while skepticism about transformative app integrations lingers. A mix of excitement and caution fills the discussion as they reflect on the future of AI.
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ChatGPT As A Major Distribution Gateway
- ChatGPT reached ~800 million weekly users, signaling massive reach and platform power.
- OpenAI now acts as a major distribution gateway for apps and developer tools.
Apps SDK Enables Contextual In-App Integrations
- The Apps SDK lets developers embed their services directly into ChatGPT and surface them contextually.
- ChatGPT can choose and call the right app inline instead of users manually selecting plugins.
Context + Apps Makes ChatGPT Stickier
- Combining memory/personalization with app integrations makes ChatGPT sticky and reduces the need to leave the app.
- Users will prefer in-chat actions when the assistant already knows their calendar, emails, and conversation context.