feat(pricing): improve model sorting and add Gemini 2.5 Pro to model selection

frontend/src/app/(dashboard)/model-pricing/page.tsx

@@ -168,8 +168,22 @@ export default function PricingPage() {
         ...v,
         display_name: allModels.find((m) => m.id === v.short_name)?.label,
         priority: allModels.find((m) => m.id === v.short_name)?.priority,
+        requiresSubscription: allModels.find((m) => m.id === v.short_name)?.requiresSubscription,
       }))
-      .sort((a, b) => (b.priority ?? 0) - (a.priority ?? 0));
+      .sort((a, b) => {
+        // First by free/premium status (premium first)
+        if (a.requiresSubscription !== b.requiresSubscription) {
+          return a.requiresSubscription ? -1 : 1;
+        }
+
+        // Then by priority (higher first)
+        if ((a.priority ?? 0) !== (b.priority ?? 0)) {
+          return (b.priority ?? 0) - (a.priority ?? 0);
+        }
+        
+        // Finally by name (alphabetical)
+        return (a.display_name ?? a.id).localeCompare(b.display_name ?? b.id);
+      });
   }, [modelsResponse?.models, allModels]);
 
   // Find the selected model

frontend/src/components/thread/chat-input/_use-model-selection.ts

@@ -37,10 +37,17 @@ export const MODELS = {
     lowQuality: false,
     description: 'Claude Sonnet 4 - Anthropic\'s latest and most advanced AI assistant'
   },
-  'claude-sonnet-3.7': { 
+  'google/gemini-2.5-pro': { 
+    tier: 'premium', 
+    priority: 100,
+    recommended: false,
+    lowQuality: false,
+    description: 'Gemini Pro 2.5 - Google\'s latest advanced model'
+  },
+  'sonnet-3.7': { 
     tier: 'premium', 
     priority: 95, 
-    recommended: true,
+    recommended: false,
     lowQuality: false,
     description: 'Claude 3.7 - Anthropic\'s most powerful AI assistant'
   },
@@ -58,13 +65,6 @@ export const MODELS = {
     lowQuality: false,
     description: 'GPT-4.1 - OpenAI\'s most advanced model with enhanced reasoning'
   },
-  'gemini-2.5-pro': { 
-    tier: 'premium', 
-    priority: 99,
-    recommended: true,
-    lowQuality: false,
-    description: 'Gemini Pro 2.5 - Google\'s latest advanced model'
-  },
   'claude-3.5': { 
     tier: 'premium', 
     priority: 90,
@@ -72,10 +72,10 @@ export const MODELS = {
     lowQuality: false,
     description: 'Claude 3.5 - Anthropic\'s balanced model with solid capabilities'
   },
-  'gemini-flash-2.5:thinking': { 
+  'gemini-2.5-flash:thinking': { 
     tier: 'premium', 
     priority: 90,
-    recommended: true,
+    recommended: false,
     lowQuality: false,
     description: 'Gemini Flash 2.5 - Google\'s fast, responsive AI model'
   },
@@ -100,10 +100,10 @@ export const MODELS = {
     lowQuality: false,
     description: 'GPT-4 - OpenAI\'s highly capable model with advanced reasoning'
   },
-  'deepseek-chat-v3-0324': { 
+  'deepseek/deepseek-chat-v3-0324': { 
     tier: 'premium', 
     priority: 75,
-    recommended: true,
+    recommended: false,
     lowQuality: false,
     description: 'DeepSeek Chat - Advanced AI assistant with strong reasoning'
   },
@@ -325,10 +325,10 @@ export const useModelSelection = () => {
     // 1. First by free/premium (free first)
     // 2. Then by priority (higher first)
     // 3. Finally by name (alphabetical)
-    return models.sort((a, b) => {
+    const sortedModels = models.sort((a, b) => {
       // First by free/premium status
       if (a.requiresSubscription !== b.requiresSubscription) {
-        return a.requiresSubscription ? 1 : -1;
+        return a.requiresSubscription ? -1 : 1;
       }
 
       // Then by priority (higher first)
@@ -339,6 +339,7 @@ export const useModelSelection = () => {
       // Finally by name
       return a.label.localeCompare(b.label);
     });
+    return sortedModels;
   }, [modelsData, isLoadingModels, customModels]);
 
   // Get filtered list of models the user can access (no additional sorting)

frontend/src/components/thread/chat-input/model-selector.tsx

@@ -705,28 +705,6 @@ export const ModelSelector: React.FC<ModelSelectorProps> = ({
                     m.label.toLowerCase().includes(searchQuery.toLowerCase()) ||
                     m.id.toLowerCase().includes(searchQuery.toLowerCase())
                   )
-                  // Sort to prioritize recommended paid models first
-                  .sort((a, b) => {
-                    const aRecommendedPaid = MODELS[a.id]?.recommended && a.requiresSubscription;
-                    const bRecommendedPaid = MODELS[b.id]?.recommended && b.requiresSubscription;
-
-                    if (aRecommendedPaid && !bRecommendedPaid) return -1;
-                    if (!aRecommendedPaid && bRecommendedPaid) return 1;
-
-                    // Secondary sorting: recommended free models next
-                    const aRecommended = MODELS[a.id]?.recommended;
-                    const bRecommended = MODELS[b.id]?.recommended;
-
-                    if (aRecommended && !bRecommended) return -1;
-                    if (!aRecommended && bRecommended) return 1;
-
-                    // Paid models next
-                    if (a.requiresSubscription && !b.requiresSubscription) return -1;
-                    if (!a.requiresSubscription && b.requiresSubscription) return 1;
-
-                    // Default to alphabetical order
-                    return a.label.localeCompare(b.label);
-                  })
                   .map((model, index) => renderModelOption(model, index))}
 
                 {uniqueModels.length === 0 && (