No, under copyright law it would be your work and your work alone.
Someone who is providing suggestions or prompts to you is not eligible to share the copyright, no matter how detailed they are. They must actually create part of the work themselves.
So for instance if you are in a recording studio then you will have the full copyright over music that you record. No matter how much advice or suggestions you get from other people in the studio with you. Your instruments/voice/lyrics, your copyright.
Otherwise copyright law would be a constant legal quagmire with those who gave you suggestions/prompts/feedback! Remember, an idea cannot be copyrighted, and prompts are ideas.
In the case of Stable Diffusion, the copyright would go to Stable Diffusion alone if it were a human. But Stable Diffusion is not a human, so there is no copyright at all.