diff --git a/src/cliproxy/account-manager.ts b/src/cliproxy/account-manager.ts
index 9919ace1..fc450c7b 100644
--- a/src/cliproxy/account-manager.ts
+++ b/src/cliproxy/account-manager.ts
@@ -14,8 +14,8 @@ import { CLIProxyProvider } from './types';
 import { getCliproxyDir, getAuthDir } from './config-generator';
 import { PROVIDER_TYPE_VALUES } from './auth/auth-types';
 
-/** Account tier for quota management */
-export type AccountTier = 'free' | 'pro' | 'ultra' | 'unknown';
+/** Account tier for quota management (free vs paid - no Pro/Ultra distinction needed) */
+export type AccountTier = 'free' | 'paid' | 'unknown';
 
 /**
  * Providers that typically have empty email in OAuth token files.
@@ -45,7 +45,7 @@ export interface AccountInfo {
   paused?: boolean;
   /** ISO timestamp when paused */
   pausedAt?: string;
-  /** Account tier: free, pro, ultra */
+  /** Account tier: free or paid (Pro/Ultra combined) */
   tier?: AccountTier;
 }
 
diff --git a/src/cliproxy/quota-fetcher.ts b/src/cliproxy/quota-fetcher.ts
index eb1429e8..4ba769a2 100644
--- a/src/cliproxy/quota-fetcher.ts
+++ b/src/cliproxy/quota-fetcher.ts
@@ -114,6 +114,7 @@ interface TokenRefreshResponse {
 /** Tier info from loadCodeAssist */
 interface TierInfo {
   id?: string;
+  isDefault?: boolean;
 }
 
 /** loadCodeAssist response */
@@ -123,6 +124,8 @@ interface LoadCodeAssistResponse {
   currentTier?: TierInfo;
   /** Paid tier (reflects actual subscription - takes priority) */
   paidTier?: TierInfo;
+  /** Array of allowed tiers - use isDefault=true to find active tier (CLIProxyAPIPlus approach) */
+  allowedTiers?: TierInfo[];
 }
 
 /** fetchAvailableModels response model */
@@ -284,22 +287,49 @@ function readAuthData(provider: CLIProxyProvider, accountId: string): AuthData |
 }
 
 /**
- * Map API tier string to AccountTier type
- * API returns tier IDs like: "standard-tier" (free), "pro-tier" (pro), "ultra-tier" (ultra)
- * Also handles legacy formats: "FREE", "PRO", "ULTRA"
+ * Map tier ID string to AccountTier type
+ * Simplified: anything with 'pro' or 'ultra' = paid, 'free'/'legacy' = free
  */
 function mapTierString(tierStr: string | undefined): AccountTier {
   if (!tierStr) return 'unknown';
   const normalized = tierStr.toLowerCase();
-  if (normalized.includes('ultra')) return 'ultra';
-  if (normalized.includes('pro')) return 'pro';
-  // "standard-tier" or "free" both map to free
-  if (normalized.includes('standard') || normalized.includes('free')) return 'free';
+  if (normalized.includes('ultra') || normalized.includes('pro')) return 'paid';
+  if (normalized.includes('free') || normalized.includes('legacy')) {
+    return 'free';
+  }
+  // "standard-tier" and other unknown values should NOT map to 'free'
+  // Let inferTierFromModels handle the detection
   return 'unknown';
 }
 
 /**
- * Get project ID and subscription tier via loadCodeAssist endpoint
+ * Infer tier from model access patterns.
+ * - Paid: Has access to Claude models OR premium Gemini models
+ * - Free: Only basic models
+ *
+ * Claude models are Ultra-exclusive, premium Gemini indicates Pro/Ultra.
+ * Both are "paid" tier for our purposes.
+ */
+function inferTierFromModels(models: ModelQuota[]): AccountTier {
+  if (models.length === 0) return 'unknown';
+
+  // Check for Claude models (Ultra-exclusive) or premium Gemini (Pro/Ultra)
+  const hasPaidAccess = models.some((m) => {
+    const name = m.name.toLowerCase();
+    return (
+      name.includes('claude') ||
+      name.includes('gemini-3-pro') ||
+      name.includes('gemini-2.5-pro') ||
+      name.includes('gemini-pro-high')
+    );
+  });
+
+  return hasPaidAccess ? 'paid' : 'unknown';
+}
+
+/**
+ * Get project ID and tier via loadCodeAssist endpoint
+ * Uses allowedTiers array with isDefault=true (CLIProxyAPIPlus approach)
  */
 async function getProjectId(accessToken: string): Promise<{
   projectId: string | null;
@@ -361,8 +391,17 @@ async function getProjectId(accessToken: string): Promise<{
       };
     }
 
-    // Extract tier: priority paidTier > currentTier (paid reflects actual subscription)
-    const tierStr = data.paidTier?.id || data.currentTier?.id;
+    // Extract tier using CLIProxyAPIPlus approach:
+    // 1. Find tier with isDefault=true in allowedTiers array
+    // 2. Fallback to paidTier > currentTier
+    let tierStr: string | undefined;
+    if (data.allowedTiers && Array.isArray(data.allowedTiers)) {
+      const defaultTier = data.allowedTiers.find((t) => t.isDefault);
+      tierStr = defaultTier?.id;
+    }
+    if (!tierStr) {
+      tierStr = data.paidTier?.id || data.currentTier?.id;
+    }
     const tier = mapTierString(tierStr);
 
     return { projectId: projectId.trim(), tier };
@@ -569,21 +608,29 @@ export async function fetchAccountQuota(
         refreshResult.accessToken,
         projectId as string
       );
-      // Use API tier (from loadCodeAssist) instead of model-based detection
+      // Determine tier: model access (Claude = Ultra) > API tier > fallback
       if (retryResult.success) {
-        retryResult.tier = apiTier;
+        let finalTier = inferTierFromModels(retryResult.models);
+        if (finalTier === 'unknown') {
+          finalTier = apiTier !== 'unknown' ? apiTier : 'paid';
+        }
+        retryResult.tier = finalTier;
         retryResult.accountId = accountId;
-        setAccountTier(provider, accountId, apiTier);
+        setAccountTier(provider, accountId, finalTier);
       }
       return retryResult;
     }
   }
 
-  // Use API tier (from loadCodeAssist) instead of model-based detection
+  // Determine tier: model access > API tier > fallback to paid
   if (result.success) {
-    result.tier = apiTier;
+    let finalTier = inferTierFromModels(result.models);
+    if (finalTier === 'unknown') {
+      finalTier = apiTier !== 'unknown' ? apiTier : 'paid';
+    }
+    result.tier = finalTier;
     result.accountId = accountId;
-    setAccountTier(provider, accountId, apiTier);
+    setAccountTier(provider, accountId, finalTier);
   }
 
   return result;
diff --git a/src/cliproxy/quota-manager.ts b/src/cliproxy/quota-manager.ts
index abc09d80..0b1d8dc7 100644
--- a/src/cliproxy/quota-manager.ts
+++ b/src/cliproxy/quota-manager.ts
@@ -199,7 +199,7 @@ export async function findHealthyAccount(
   exclude: string[]
 ): Promise<{ id: string; tier: string; lastQuota: number } | null> {
   const config = loadOrCreateUnifiedConfig();
-  const tierPriority = config.quota_management?.auto?.tier_priority ?? ['ultra', 'pro'];
+  const tierPriority = config.quota_management?.auto?.tier_priority ?? ['paid'];
   const threshold = config.quota_management?.auto?.exhaustion_threshold ?? 5;
 
   const accounts = getProviderAccounts(provider);
@@ -224,7 +224,7 @@ export async function findHealthyAccount(
 
       return {
         id: account.id,
-        tier: account.tier || 'pro',
+        tier: account.tier || 'paid',
         lastQuota: avgQuota,
       };
     })
diff --git a/src/config/unified-config-loader.ts b/src/config/unified-config-loader.ts
index 3a23ba1e..9f3935b2 100644
--- a/src/config/unified-config-loader.ts
+++ b/src/config/unified-config-loader.ts
@@ -17,6 +17,7 @@ import {
   DEFAULT_COPILOT_CONFIG,
   DEFAULT_GLOBAL_ENV,
   DEFAULT_CLIPROXY_SERVER_CONFIG,
+  DEFAULT_QUOTA_MANAGEMENT_CONFIG,
   GlobalEnvConfig,
 } from './unified-config-types';
 import { isUnifiedConfigEnabled } from './feature-flags';
@@ -212,6 +213,35 @@ function mergeWithDefaults(partial: Partial<UnifiedConfig>): UnifiedConfig {
           DEFAULT_CLIPROXY_SERVER_CONFIG.local.auto_start,
       },
     },
+    // Quota management config - hybrid auto+manual account selection
+    quota_management: {
+      mode: partial.quota_management?.mode ?? DEFAULT_QUOTA_MANAGEMENT_CONFIG.mode,
+      auto: {
+        preflight_check:
+          partial.quota_management?.auto?.preflight_check ??
+          DEFAULT_QUOTA_MANAGEMENT_CONFIG.auto.preflight_check,
+        exhaustion_threshold:
+          partial.quota_management?.auto?.exhaustion_threshold ??
+          DEFAULT_QUOTA_MANAGEMENT_CONFIG.auto.exhaustion_threshold,
+        tier_priority:
+          partial.quota_management?.auto?.tier_priority ??
+          DEFAULT_QUOTA_MANAGEMENT_CONFIG.auto.tier_priority,
+        cooldown_minutes:
+          partial.quota_management?.auto?.cooldown_minutes ??
+          DEFAULT_QUOTA_MANAGEMENT_CONFIG.auto.cooldown_minutes,
+      },
+      manual: {
+        paused_accounts:
+          partial.quota_management?.manual?.paused_accounts ??
+          DEFAULT_QUOTA_MANAGEMENT_CONFIG.manual.paused_accounts,
+        forced_default:
+          partial.quota_management?.manual?.forced_default ??
+          DEFAULT_QUOTA_MANAGEMENT_CONFIG.manual.forced_default,
+        tier_lock:
+          partial.quota_management?.manual?.tier_lock ??
+          DEFAULT_QUOTA_MANAGEMENT_CONFIG.manual.tier_lock,
+      },
+    },
   };
 }
 
diff --git a/src/config/unified-config-types.ts b/src/config/unified-config-types.ts
index ac17e17d..e5eec79b 100644
--- a/src/config/unified-config-types.ts
+++ b/src/config/unified-config-types.ts
@@ -356,7 +356,7 @@ export interface AutoQuotaConfig {
   preflight_check: boolean;
   /** Quota percentage below which account is "exhausted" (default: 5) */
   exhaustion_threshold: number;
-  /** Tier priority for failover, highest to lowest (default: ['ultra', 'pro']) */
+  /** Tier priority for failover, highest to lowest (default: ['paid']) */
   tier_priority: string[];
   /** Minutes to skip exhausted account before retry (default: 5) */
   cooldown_minutes: number;
@@ -402,7 +402,7 @@ export interface QuotaManagementConfig {
 export const DEFAULT_AUTO_QUOTA_CONFIG: AutoQuotaConfig = {
   preflight_check: true,
   exhaustion_threshold: 5,
-  tier_priority: ['ultra', 'pro'],
+  tier_priority: ['paid'],
   cooldown_minutes: 5,
 };
 
diff --git a/ui/src/components/cliproxy/provider-editor/account-item.tsx b/ui/src/components/cliproxy/provider-editor/account-item.tsx
index 072094ef..8c6ac2f0 100644
--- a/ui/src/components/cliproxy/provider-editor/account-item.tsx
+++ b/ui/src/components/cliproxy/provider-editor/account-item.tsx
@@ -148,8 +148,7 @@ export function AccountItem({
                   variant="outline"
                   className={cn(
                     'text-[10px] h-4 px-1.5 uppercase',
-                    account.tier === 'ultra' && 'border-purple-500 text-purple-600',
-                    account.tier === 'pro' && 'border-blue-500 text-blue-600',
+                    account.tier === 'paid' && 'border-blue-500 text-blue-600',
                     account.tier === 'free' && 'border-gray-400 text-gray-500'
                   )}
                 >
diff --git a/ui/src/lib/api-client.ts b/ui/src/lib/api-client.ts
index f8ef47e1..22d67bb0 100644
--- a/ui/src/lib/api-client.ts
+++ b/ui/src/lib/api-client.ts
@@ -81,8 +81,8 @@ export interface OAuthAccount {
   paused?: boolean;
   /** ISO timestamp when account was paused */
   pausedAt?: string;
-  /** Account tier: free, pro, ultra */
-  tier?: 'free' | 'pro' | 'ultra' | 'unknown';
+  /** Account tier: free or paid (Pro/Ultra combined) */
+  tier?: 'free' | 'paid' | 'unknown';
 }
 
 export interface AuthStatus {