This is stable diffusion 1.5. https://civitai.com/ https://civitai.com/ and https://huggingface.co/ https://huggingface.co/ suggest the popular options are SDXL

This is stable diffusion 1.5. https://civitai.com/ https://civitai.com/ and https://huggingface.co/ https://huggingface.co/ suggest the popular options are SDXL based - it is a much better model (effectively SD 2.5). Still imperfect, but much better.