feat: default model metadata & params

backend/open_webui/config.py

@@ -1263,6 +1263,18 @@ MODEL_ORDER_LIST = PersistentConfig(
     [],
 )
 
+DEFAULT_MODEL_METADATA = PersistentConfig(
+    "DEFAULT_MODEL_METADATA",
+    "models.default_metadata",
+    {},
+)
+
+DEFAULT_MODEL_PARAMS = PersistentConfig(
+    "DEFAULT_MODEL_PARAMS",
+    "models.default_params",
+    {},
+)
+
 DEFAULT_USER_ROLE = PersistentConfig(
     "DEFAULT_USER_ROLE",
     "ui.default_user_role",

backend/open_webui/main.py

@@ -394,6 +394,8 @@ from open_webui.config import (
     DEFAULT_PINNED_MODELS,
     DEFAULT_ARENA_MODEL,
     MODEL_ORDER_LIST,
+    DEFAULT_MODEL_METADATA,
+    DEFAULT_MODEL_PARAMS,
     EVALUATION_ARENA_MODELS,
     # WebUI (OAuth)
     ENABLE_OAUTH_ROLE_MANAGEMENT,
@@ -822,6 +824,8 @@ app.state.config.ADMIN_EMAIL = ADMIN_EMAIL
 app.state.config.DEFAULT_MODELS = DEFAULT_MODELS
 app.state.config.DEFAULT_PINNED_MODELS = DEFAULT_PINNED_MODELS
 app.state.config.MODEL_ORDER_LIST = MODEL_ORDER_LIST
+app.state.config.DEFAULT_MODEL_METADATA = DEFAULT_MODEL_METADATA
+app.state.config.DEFAULT_MODEL_PARAMS = DEFAULT_MODEL_PARAMS
 
 
 app.state.config.DEFAULT_PROMPT_SUGGESTIONS = DEFAULT_PROMPT_SUGGESTIONS
@@ -1688,9 +1692,14 @@ async def chat_completion(
             request.state.direct = True
             request.state.model = model
 
-        model_info_params = (
-            model_info.params.model_dump() if model_info and model_info.params else {}
+        # Model params: global defaults as base, per-model overrides win
+        default_model_params = (
+            getattr(request.app.state.config, "DEFAULT_MODEL_PARAMS", None) or {}
         )
+        model_info_params = {
+            **default_model_params,
+            **(model_info.params.model_dump() if model_info and model_info.params else {}),
+        }
 
         # Check base model existence for custom models
         if model_info_params.get("base_model_id"):

backend/open_webui/routers/configs.py

@@ -467,6 +467,8 @@ class ModelsConfigForm(BaseModel):
     DEFAULT_MODELS: Optional[str]
     DEFAULT_PINNED_MODELS: Optional[str]
     MODEL_ORDER_LIST: Optional[list[str]]
+    DEFAULT_MODEL_METADATA: Optional[dict] = None
+    DEFAULT_MODEL_PARAMS: Optional[dict] = None
 
 
 @router.get("/models", response_model=ModelsConfigForm)
@@ -475,6 +477,8 @@ async def get_models_config(request: Request, user=Depends(get_admin_user)):
         "DEFAULT_MODELS": request.app.state.config.DEFAULT_MODELS,
         "DEFAULT_PINNED_MODELS": request.app.state.config.DEFAULT_PINNED_MODELS,
         "MODEL_ORDER_LIST": request.app.state.config.MODEL_ORDER_LIST,
+        "DEFAULT_MODEL_METADATA": request.app.state.config.DEFAULT_MODEL_METADATA,
+        "DEFAULT_MODEL_PARAMS": request.app.state.config.DEFAULT_MODEL_PARAMS,
     }
 
 
@@ -485,10 +489,14 @@ async def set_models_config(
     request.app.state.config.DEFAULT_MODELS = form_data.DEFAULT_MODELS
     request.app.state.config.DEFAULT_PINNED_MODELS = form_data.DEFAULT_PINNED_MODELS
     request.app.state.config.MODEL_ORDER_LIST = form_data.MODEL_ORDER_LIST
+    request.app.state.config.DEFAULT_MODEL_METADATA = form_data.DEFAULT_MODEL_METADATA
+    request.app.state.config.DEFAULT_MODEL_PARAMS = form_data.DEFAULT_MODEL_PARAMS
     return {
         "DEFAULT_MODELS": request.app.state.config.DEFAULT_MODELS,
         "DEFAULT_PINNED_MODELS": request.app.state.config.DEFAULT_PINNED_MODELS,
         "MODEL_ORDER_LIST": request.app.state.config.MODEL_ORDER_LIST,
+        "DEFAULT_MODEL_METADATA": request.app.state.config.DEFAULT_MODEL_METADATA,
+        "DEFAULT_MODEL_PARAMS": request.app.state.config.DEFAULT_MODEL_PARAMS,
     }
 
 

backend/open_webui/utils/models.py

@@ -1,3 +1,4 @@
+import copy
 import time
 import logging
 import asyncio
@@ -307,6 +308,29 @@ async def get_all_models(request, refresh: bool = False, user: UserModel = None)
         except Exception as e:
             log.info(f"Failed to load function module for {function_id}: {e}")
 
+    # Apply global model defaults to all models
+    # Per-model overrides take precedence over global defaults
+    default_metadata = (
+        getattr(request.app.state.config, "DEFAULT_MODEL_METADATA", None) or {}
+    )
+
+    if default_metadata:
+        for model in models:
+            info = model.get("info")
+
+            if info is None:
+                model["info"] = {"meta": copy.deepcopy(default_metadata)}
+                continue
+
+            meta = info.setdefault("meta", {})
+            for key, value in default_metadata.items():
+                if key == "capabilities":
+                    # Merge capabilities: defaults as base, per-model overrides win
+                    existing = meta.get("capabilities") or {}
+                    meta["capabilities"] = {**value, **existing}
+                elif meta.get(key) is None:
+                    meta[key] = copy.deepcopy(value)
+
     for model in models:
         action_ids = [
             action_id