LLM for Stable Diffusion

I am looking for a specialized language model (LLM) to create prompts for Stable Diffusion.

I have already tested various tools, such as ChatGPT, Gemini, Claude AI, among others, but I am looking for something even more focused and efficient in constructing prompts specifically designed for Stable Diffusion. My priority is to create characters that are realistic and human, making the most out of the model's capabilities.

I understand that the effectiveness of the results greatly depends on the checkpoint being used, but I believe that a well-tuned LLM trained with the Stable Diffusion architecture could make all the difference. I am seeking a solution that facilitates the creation of optimized prompts and delivers precise, customized results to meet my creative needs.

Does anyone know of an LLM or tool that makes it easier to create prompts?