To be fair, a prompt fed into a generative tool _could_ be considered an artist's creative expression.
I wonder about something like this[0]. So much awesome engineering went into it. And the guy is clearly an artist and considers himself an artist[1]. As it is his own tool, are the random splatters it generates not copyrightable?
>To be fair, a prompt fed into a generative tool _could_ be considered an artist's creative expression.
Depending on if the prompt met other guidelines for copyright, it would be pretty uncontroversial to say you own the copyright on the prompt.
Copyright on the picture, is about as assignable as if you invited ten painters over to your house and read the prompt as spoken word poetry, then received one painting at random. The fact that your prompt won't reliably produce the same picture suggests that you are not in control of the artistic choices made, and therefore have no claim to the copyright.
>a prompt fed into a generative tool _could_ be considered an artist's creative expression.
Then it's the prompt that is copyrighted, not the end result.
US copyright law specifically states that only works fixed into existence by a human author can be copyrighted, and specifically excludes processes or procedures by which a work might ultimately come to be fixed.
In terms of AI, then it should be clear that the prompts (that AI used to generate my work) are my creative expressions. Sure, the AI may alter it in some unknown ways, but does this make it any less so my creative expression?