diff --git a/py/routes/handlers/model_handlers.py b/py/routes/handlers/model_handlers.py
index e6fc99b5..62aae575 100644
--- a/py/routes/handlers/model_handlers.py
+++ b/py/routes/handlers/model_handlers.py
@@ -6,6 +6,7 @@ import asyncio
 import json
 import logging
 import os
+import re
 import time
 from dataclasses import dataclass
 from typing import Any, Awaitable, Callable, Dict, Iterable, List, Mapping, Optional
@@ -755,19 +756,22 @@ class ModelQueryHandler:
 
     async def find_duplicate_models(self, request: web.Request) -> web.Response:
         try:
+            filters = self._parse_duplicate_filters(request)
             duplicates = self._service.find_duplicate_hashes()
             result = []
             cache = await self._service.scanner.get_cached_data()
+
             for sha256, paths in duplicates.items():
-                group = {"hash": sha256, "models": []}
+                # Collect all models in this group
+                all_models = []
                 for path in paths:
                     model = next(
                         (m for m in cache.raw_data if m["file_path"] == path), None
                     )
                     if model:
-                        group["models"].append(
-                            await self._service.format_response(model)
-                        )
+                        all_models.append(model)
+
+                # Include primary if not already in paths
                 primary_path = self._service.get_path_by_hash(sha256)
                 if primary_path and primary_path not in paths:
                     primary_model = next(
@@ -775,11 +779,25 @@ class ModelQueryHandler:
                         None,
                     )
                     if primary_model:
-                        group["models"].insert(
-                            0, await self._service.format_response(primary_model)
-                        )
+                        all_models.insert(0, primary_model)
+
+                # Apply filters
+                filtered = self._apply_duplicate_filters(all_models, filters)
+
+                # Sort: originals first, copies last
+                sorted_models = self._sort_duplicate_group(filtered)
+
+                # Format response
+                group = {"hash": sha256, "models": []}
+                for model in sorted_models:
+                    group["models"].append(
+                        await self._service.format_response(model)
+                    )
+
+                # Only include groups with 2+ models after filtering
                 if len(group["models"]) > 1:
                     result.append(group)
+
             return web.json_response(
                 {"success": True, "duplicates": result, "count": len(result)}
             )
@@ -792,6 +810,83 @@ class ModelQueryHandler:
             )
             return web.json_response({"success": False, "error": str(exc)}, status=500)
 
+    def _parse_duplicate_filters(self, request: web.Request) -> Dict[str, Any]:
+        """Parse filter parameters from the request for duplicate finding."""
+        return {
+            "base_models": request.query.getall("base_model", []),
+            "tag_include": request.query.getall("tag_include", []),
+            "tag_exclude": request.query.getall("tag_exclude", []),
+            "model_types": request.query.getall("model_type", []),
+            "folder": request.query.get("folder"),
+            "favorites_only": request.query.get("favorites_only", "").lower() == "true",
+        }
+
+    def _apply_duplicate_filters(self, models: List[Dict[str, Any]], filters: Dict[str, Any]) -> List[Dict[str, Any]]:
+        """Apply filters to a list of models within a duplicate group."""
+        result = models
+
+        # Apply base model filter
+        if filters.get("base_models"):
+            base_set = set(filters["base_models"])
+            result = [m for m in result if m.get("base_model") in base_set]
+
+        # Apply tag filters (include)
+        for tag in filters.get("tag_include", []):
+            if tag == "__no_tags__":
+                result = [m for m in result if not m.get("tags")]
+            else:
+                result = [m for m in result if tag in (m.get("tags") or [])]
+
+        # Apply tag filters (exclude)
+        for tag in filters.get("tag_exclude", []):
+            if tag == "__no_tags__":
+                result = [m for m in result if m.get("tags")]
+            else:
+                result = [m for m in result if tag not in (m.get("tags") or [])]
+
+        # Apply model type filter
+        if filters.get("model_types"):
+            type_set = {t.lower() for t in filters["model_types"]}
+            result = [
+                m for m in result if (m.get("model_type") or "").lower() in type_set
+            ]
+
+        # Apply folder filter
+        if filters.get("folder"):
+            folder = filters["folder"]
+            result = [m for m in result if m.get("folder", "").startswith(folder)]
+
+        # Apply favorites filter
+        if filters.get("favorites_only"):
+            result = [m for m in result if m.get("favorite", False)]
+
+        return result
+
+    def _sort_duplicate_group(self, models: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
+        """Sort models: originals first (left), copies (with -????. pattern) last (right)."""
+        if len(models) <= 1:
+            return models
+
+        min_len = min(len(m.get("file_name", "")) for m in models)
+
+        def copy_score(m):
+            fn = m.get("file_name", "")
+            score = 0
+            # Match -0001.safetensors, -1234.safetensors etc.
+            if re.search(r"-\d{4}\.", fn):
+                score += 100
+            # Match (1), (2) etc.
+            if re.search(r"\(\d+\)", fn):
+                score += 50
+            # Match 'copy' in filename
+            if "copy" in fn.lower():
+                score += 50
+            # Longer filenames are more likely copies
+            score += len(fn) - min_len
+            return (score, fn.lower())
+
+        return sorted(models, key=copy_score)
+
     async def find_filename_conflicts(self, request: web.Request) -> web.Response:
         try:
             duplicates = self._service.find_duplicate_filenames()
diff --git a/static/js/components/ModelDuplicatesManager.js b/static/js/components/ModelDuplicatesManager.js
index 33df3779..4a818729 100644
--- a/static/js/components/ModelDuplicatesManager.js
+++ b/static/js/components/ModelDuplicatesManager.js
@@ -48,15 +48,18 @@ export class ModelDuplicatesManager {
     // Method to check for duplicates count using existing endpoint
     async checkDuplicatesCount() {
         try {
+            const params = this._buildFilterQueryParams();
             const endpoint = `/api/lm/${this.modelType}/find-duplicates`;
-            const response = await fetch(endpoint);
-            
+            const url = params.toString() ? `${endpoint}?${params}` : endpoint;
+
+            const response = await fetch(url);
+
             if (!response.ok) {
                 throw new Error(`Failed to get duplicates count: ${response.statusText}`);
             }
-            
+
             const data = await response.json();
-            
+
             if (data.success) {
                 const duplicatesCount = (data.duplicates || []).length;
                 this.updateDuplicatesBadge(duplicatesCount);
@@ -103,29 +106,30 @@ export class ModelDuplicatesManager {
     
     async findDuplicates() {
         try {
-            // Determine API endpoint based on model type
+            const params = this._buildFilterQueryParams();
             const endpoint = `/api/lm/${this.modelType}/find-duplicates`;
-            
-            const response = await fetch(endpoint);
+            const url = params.toString() ? `${endpoint}?${params}` : endpoint;
+
+            const response = await fetch(url);
             if (!response.ok) {
                 throw new Error(`Failed to find duplicates: ${response.statusText}`);
             }
-            
+
             const data = await response.json();
             if (!data.success) {
                 throw new Error(data.error || 'Unknown error finding duplicates');
             }
-            
+
             this.duplicateGroups = data.duplicates || [];
-            
+
             // Update the badge with the current count
             this.updateDuplicatesBadge(this.duplicateGroups.length);
-            
+
             if (this.duplicateGroups.length === 0) {
                 showToast('toast.duplicates.noDuplicatesFound', { type: this.modelType }, 'info');
                 return false;
             }
-            
+
             this.enterDuplicateMode();
             return true;
         } catch (error) {
@@ -134,6 +138,51 @@ export class ModelDuplicatesManager {
             return false;
         }
     }
+
+    /**
+     * Build query parameters from current filter state for duplicate finding.
+     * @returns {URLSearchParams} The query parameters to append to the API endpoint
+     */
+    _buildFilterQueryParams() {
+        const params = new URLSearchParams();
+        const pageState = getCurrentPageState();
+        const filters = pageState?.filters;
+
+        if (!filters) return params;
+
+        // Base model filters
+        if (filters.baseModel && Array.isArray(filters.baseModel)) {
+            filters.baseModel.forEach(m => params.append('base_model', m));
+        }
+
+        // Tag filters (tri-state: include/exclude)
+        if (filters.tags && typeof filters.tags === 'object') {
+            Object.entries(filters.tags).forEach(([tag, state]) => {
+                if (state === 'include') {
+                    params.append('tag_include', tag);
+                } else if (state === 'exclude') {
+                    params.append('tag_exclude', tag);
+                }
+            });
+        }
+
+        // Model type filters
+        if (filters.modelTypes && Array.isArray(filters.modelTypes)) {
+            filters.modelTypes.forEach(t => params.append('model_type', t));
+        }
+
+        // Folder filter (from active folder state)
+        if (pageState.activeFolder) {
+            params.append('folder', pageState.activeFolder);
+        }
+
+        // Favorites filter
+        if (pageState.showFavoritesOnly) {
+            params.append('favorites_only', 'true');
+        }
+
+        return params;
+    }
     
     enterDuplicateMode() {
         this.inDuplicateMode = true;
diff --git a/static/js/managers/FilterManager.js b/static/js/managers/FilterManager.js
index b8aef214..3cf61233 100644
--- a/static/js/managers/FilterManager.js
+++ b/static/js/managers/FilterManager.js
@@ -549,6 +549,17 @@ export class FilterManager {
                 showToast('toast.filters.cleared', {}, 'info');
             }
         }
+
+        // Refresh duplicates with new filters
+        if (window.modelDuplicatesManager) {
+            if (window.modelDuplicatesManager.inDuplicateMode) {
+                // In duplicate mode: refresh the duplicate list
+                await window.modelDuplicatesManager.findDuplicates();
+            } else {
+                // Not in duplicate mode: just update badge count
+                window.modelDuplicatesManager.checkDuplicatesCount();
+            }
+        }
     }
 
     async clearFilters() {