Most of them are closed source, but you can reverse engineer them.

它们中的大多数都是封闭源代码，但您可以对它们进行逆向工程。

And so I, with a number of other people, created OpenAI, and although initially it was created as an open source non-profit, and now it is closed source and for profit.

所以我和其他很多人，创建了OpenAI，尽管最初它是作为一个开源的非营利组织创建的，但是现在它是一个闭源的营利性组织。