Looking for AI Image Generator recommendations

My event planning app allows a user to create an image for their project using AI. I have an integration with Freepik API using their flux pro model to generate the image based on keywords entered by the user. It seemed to be working pretty well so far, and their usage based model works great for me. But off late, I notice it is slow, or sometimes just fails. I just get a status FAILED, and nothing else.

I am considering moving to another AI image generation platform, and would like your recommendations and feedback on ease of integration, quality of images, speed, and price. I am looking to save some time here by leaning on the expertise of this community.

Thanks in advance. I really appreciate your help.