OpenAI DevDay 2025: AgentKit and the Apps SDK Turn ChatGPT Into a Platform
At DevDay on October 6, 2025, OpenAI shipped AgentKit and the Apps SDK, and opened Sora 2 and GPT-5 Pro via API — a full platform play.
OpenAI held DevDay in San Francisco on October 6, 2025: it shipped AgentKit, a full toolchain for building agents, and the Apps SDK that lets developers embed apps directly inside ChatGPT; Sora 2 and GPT-5 Pro opened via API the same day.
Per ZDNET, the throughline was platformization: ChatGPT upgraded from chat app to app-distribution platform, with Spotify, Zillow and others callable inside conversations. Sam Altman also discussed hardware ambitions with Jony Ive on stage.
From the GPT Store to the Apps SDK, OpenAI's platform ambition is clear: it is not building a better chatbot — it is building the operating system of the AI era.
This article aggregates official announcements and public reporting; original sources are linked below.
Source:ZDNET