feat: default model metadata & 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