At its annual DevDay event, OpenAI announced several initiatives for developers — who now number 4 million, according to the company. Of most interest was the new Apps SDK, which allows third-party developers to build web-based applications that run as interactive components inside ChatGPT conversations. OpenAI says it will “begin accepting app submissions for review and publication” later this year.
Yes, that’s right: it’s an application platform for ChatGPT. This has echoes of the great smartphone app platform announcements of…

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