If you're looking for a plugin that works with Photoshop and can use multiple large language models for image generation, ImageCreator is a great option. This free plugin supports advanced models like Stable Diffusion, LoRA, ControlNet and Generative Fill, and lets you generate high-quality, production-ready art assets. It also comes with a ModelHub for customizing and applying different models, so it's easy to use and adaptable.
Another option worth mentioning is PixelPet, which offers a Photoshop plugin in addition to its ability to generate high-resolution images from text prompts using SD 1.5 Civitai models. It can handle photorealism and can optimize prompts for better results, so it's a good option for artists and designers who want to integrate it directly into their workflow.
If you're looking for a more full-featured platform, you might want to check out Role Model AI. This one-stop-shop supports multiple Large Language Models (LLMs) and includes a range of generative tools, including image generation. It's a flexible tool that can be used to create music, video and even 3D environments, with adjustable settings and different pricing tiers depending on your needs.
Last, Getimg.ai offers a powerful image creation and editing platform with tools like AI Generator, Image to Video conversion and AI Canvas. It supports more than 80 community-trained AI models and lets you control the generation process with tools like ControlNet. It's good for a wide range of creative tasks, including architecture and art.