Open WebUI accepts a JSON file at Workspace → Models → Import that
seeds a new model preset in one click instead of the manual table-
driven setup. The new image_studio.json mirrors the Open WebUI bulk-
export schema (array wrapper around the model object with id, name,
base_model_id, params, meta) and pre-fills system prompt, native
function calling, temperature 0.5, top_p 0.9, smart_image_gen tool
attachment, suggestion prompts.
The markdown walkthrough stays as the source of truth for the system
prompt content and as the fallback when import fails (e.g. tool ID
mismatch, unfamiliar field, schema drift across Open WebUI versions).
README points at both paths.
Caveat doc'd in the markdown: if the imported preset doesn't actually
have smart_image_gen attached, the tool ID in the JSON didn't match
what Open WebUI assigned — re-attach manually in the model edit
screen.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The Tool now exposes two methods the LLM picks between based on whether
the user attached an image:
generate_image — txt2img (existing, unchanged behavior)
edit_image — img2img on the most recently attached image
edit_image extracts the source image from __messages__ (base64 data
URIs in image_url content blocks) or __files__ (local path or URL),
uploads to ComfyUI's /upload/image, runs an img2img workflow at the
caller-specified denoise (default 0.7), and returns the edited result.
Same per-style routing / sampler / CFG / prefix logic as generation.
Refactored the submit-and-poll loop into _submit_and_fetch shared by
both methods. Image extraction is defensive — tries messages first,
then files (path then URL), returns a clear "no image attached"
message rather than silently generating from scratch.
Image Studio system prompt rewritten to teach the LLM when to call
edit_image vs generate_image and how to pick denoise.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
A documented Open WebUI custom-model preset wrapping mistral-nemo:12b
with: aggressive system prompt that mandates calling generate_image,
only the smart_image_gen tool attached, native function calling,
lower temperature for tool-call reliability. Users pick "Image Studio"
from the chat-model dropdown when they want images.
Solves the common case where general-purpose chat models describe an
image in text instead of firing the tool — usually on conversational
phrasings like "can you draw me…". The preset removes the ambiguity
by giving the LLM exactly one job and one tool.
Setup walkthrough in openwebui-models/image_studio.md; deployment
README §9 points users at it as the recommended path.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
57_WolveandClaude Opus 4.7