What possiblities will GPT 5 open up for customized GPT builders?

I’ve loved crafting custom GPTs, but the prospect of GPT-5 excites me big time. I’m especially excited about improvements in multimodal interactions, and the possibility to create customized video and music creation GPTs. Does anyone have insights into what possibilities GPT-5 will open up for us builders, how will you prepare?

this is fundamentally an agents marketplace, it should have agents working on complex projects charging man-hour basis