diff --git a/config.py b/config.py
index be1d27c..bb2f48e 100644
--- a/config.py
+++ b/config.py
@@ -40,6 +40,7 @@ class Config:
     TRIAL_API = "https://ai.comfly.chat/v1/images/generations"
     TRIAL_KEY = "sk-Rr8L5noW8Qga7K4jmey3yYZYL1a4SlhlNlo5iZrwqJRK1Pa1"
     PREMIUM_KEY = "sk-168trRxnemem6nTpQn1rbmJ4SFKLwTMsZ0G6uk5OipP7FKAY"
+    GEMINI_FLASH_IMAGE_PREMIUM_KEY = "sk-OEbEnJORrKx4YEnLPEbwQL3eS5sp0eeSbtUepUrsIqjaLc1X"
     
     DICT_URL = "https://nas.4x4g.com:10011/api/common/sys/dict"
     PLATFORM = "lingmao"
diff --git a/services/generation_service.py b/services/generation_service.py
index 3aa73e4..40e181f 100644
--- a/services/generation_service.py
+++ b/services/generation_service.py
@@ -30,6 +30,10 @@ def validate_generation_request(user, data):
     is_premium = data.get('is_premium', False)
     input_key = data.get('apiKey')
     model_value = data.get('model')
+    is_gemini_flash_image_preview = model_value == 'gemini-3.1-flash-image-preview'
+
+    if isinstance(is_premium, str):
+        is_premium = is_premium.lower() in ('1', 'true', 'yes', 'on')
     
     target_api = Config.AI_API
     api_key = None
@@ -46,7 +50,12 @@ def validate_generation_request(user, data):
             db.session.commit()
     else:
         if user.points > 0:
-            api_key = Config.PREMIUM_KEY if is_premium else Config.TRIAL_KEY
+            if is_premium:
+                api_key = Config.GEMINI_FLASH_IMAGE_PREMIUM_KEY if is_gemini_flash_image_preview else Config.PREMIUM_KEY
+            elif is_gemini_flash_image_preview:
+                api_key = Config.PREMIUM_KEY
+            else:
+                api_key = Config.TRIAL_KEY
             target_api = Config.TRIAL_API
             use_trial = True
         else:
diff --git a/templates/mobile.html b/templates/mobile.html
index 071a6a4..17b81ab 100644
--- a/templates/mobile.html
+++ b/templates/mobile.html
@@ -442,6 +442,7 @@
 
                 // 初始化尺寸选择器显示状态
                 updateSizeVisibility();
+                updateCostPreview();
             } catch (e) {
                 console.error('加载配置失败', e);
             }
@@ -857,4 +858,4 @@
     </script>
 </body>
 
-</html>
\ No newline at end of file
+</html>