feat(openrouter): prioritize Exacto models for better agentic performance

- Add isExacto field to CategorizedModel for models with :exacto suffix
- Add sortModelsByPriority function (Free > Exacto > Regular)
- Apply priority sorting within each category in model picker
- Add visual "Exacto" badge (green outline) for exacto variants

Exacto models are OpenRouter's specialized variants optimized for
tool use and agentic behaviors, recommended for Claude Code.

ui/src/components/profiles/openrouter-model-picker.tsx

@@ -13,6 +13,7 @@ import { Search, RefreshCw, Loader2, Sparkles } from 'lucide-react';
 import { useOpenRouterCatalog, useRefreshOpenRouterModels } from '@/hooks/use-openrouter-models';
 import {
   searchModels,
+  sortModelsByPriority,
   formatPricingPair,
   formatContextLength,
   formatModelAge,
@@ -56,7 +57,7 @@ export function OpenRouterModelPicker({
   // Determine if we should show presets (no search query and no category filter)
   const showPresets = !search.trim() && !selectedCategory;
 
-  // Group by category
+  // Group by category and sort each group by priority (Free > Exacto > Regular)
   const groupedModels = useMemo(() => {
     const groups: Record<ModelCategory, CategorizedModel[]> = {
       anthropic: [],
@@ -72,6 +73,11 @@ export function OpenRouterModelPicker({
       groups[model.category].push(model);
     });
 
+    // Sort each category by priority
+    for (const category of Object.keys(groups) as ModelCategory[]) {
+      groups[category] = sortModelsByPriority(groups[category]);
+    }
+
     return groups;
   }, [filteredModels]);
 
@@ -275,6 +281,21 @@ function ModelItem({
           >
             Free
           </Badge>
+        ) : model.isExacto ? (
+          <>
+            <Badge
+              variant="outline"
+              className={cn(
+                'text-[10px] px-1 border-emerald-500/50 text-emerald-600',
+                isSelected
+                  ? 'border-accent-foreground/30 text-accent-foreground/80'
+                  : 'group-hover:border-accent-foreground/30 group-hover:text-accent-foreground/80'
+              )}
+            >
+              Exacto
+            </Badge>
+            <span className="tabular-nums">{formatPricingPair(model.pricing)}</span>
+          </>
         ) : (
           <span className="tabular-nums">{formatPricingPair(model.pricing)}</span>
         )}

ui/src/lib/openrouter-types.ts

@@ -69,4 +69,5 @@ export interface CategorizedModel extends OpenRouterModel {
   pricePerMillionPrompt: number;
   pricePerMillionCompletion: number;
   isFree: boolean;
+  isExacto: boolean; // Models with :exacto suffix - optimized for tool use
 }

ui/src/lib/openrouter-utils.ts

@@ -54,6 +54,7 @@ export function enrichModel(model: OpenRouterModel): CategorizedModel {
     pricePerMillionPrompt: pricePerMillion(model.pricing.prompt),
     pricePerMillionCompletion: pricePerMillion(model.pricing.completion),
     isFree: model.pricing.prompt === '0' && model.pricing.completion === '0',
+    isExacto: model.id.includes(':exacto'), // Exacto variants - optimized for agentic/tool use
   };
 }
 
@@ -85,6 +86,27 @@ export function searchModels(
   });
 }
 
+/**
+ * Sort models with priority: Free > Exacto > Regular
+ * Within each tier, sort by name alphabetically
+ */
+export function sortModelsByPriority(models: CategorizedModel[]): CategorizedModel[] {
+  return [...models].sort((a, b) => {
+    // Priority 1: Free models first
+    if (a.isFree && !b.isFree) return -1;
+    if (!a.isFree && b.isFree) return 1;
+
+    // Priority 2: Exacto models second (only if both not free)
+    if (!a.isFree && !b.isFree) {
+      if (a.isExacto && !b.isExacto) return -1;
+      if (!a.isExacto && b.isExacto) return 1;
+    }
+
+    // Same tier: sort by name
+    return a.name.localeCompare(b.name);
+  });
+}
+
 /** Get cached models from localStorage */
 export function getCachedModels(): OpenRouterModel[] | null {
   try {