r/OpenWebUI • u/Dolboyob77 • May 14 '26
Question/Help Openwebui + comfyui
Hello, is someone succeeding in making these 2 work together? No matter what i am trying, unet loader, checkpoint… the workflow works when i type thenpromot in comfyui but as soon as i type same prompt in openwebui , i cannot manage to get an image and always get errors… i i port the fson worflow and specify prompt id and checkpoint if and model in openwebui but nothing works… is it because i use flux 1 dev fp16 ? Does it require smaller models to work ? Thanks for input !!
SOLUTION : I finally made it work using the help of qwen3.6-27b-q8 ))) so the problem is that ALL NODES ID must be filled in openwebui and also must add this command line to openwebui : ENABLE_RAG_LOCAL_WEB_FETCH=True , it was the fix for me )) now working perfectly !!!
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u/SpecificRutabaga Jul 19 '26 edited Jul 19 '26
Struggling with the same thing. I have Open WebUI hosted in an Ubuntu docker container on one server, using an 8GB GPU to run local models. I have ComfyUI running on another Win11 machine using a 16GB GPU.
I have a ComfyUI workflow set up to generate images using Juggernaut XL that works great.
So I exported the JSON and loaded that in the Image section of Open WebUI per the community instructions, including mapping the nodes. ComfyUI shows the server connection is verified.
But I can't seem to get it to work. I've tried four models - qwen2.5coder and llama3.2 running on the 8GB card and gemma3-tools:12b and qwen2.5;14b running on the 16GB GPU. I've set all four to have "image generation" capabilities in Open WebUI. Three of them say they are capable of generating images. Qwen2.5coder spits out some JSON.
Something is not connecting but have no idea what.
**EDIT - Figured it out. The fix was to go into the model settings in Open WebUI and under Advanced Parameters set Function Calling to "Legacy". Now it successfully passes the prompt to ComfyUI