diff --git a/web/src/components/message-input/next.tsx b/web/src/components/message-input/next.tsx
index 99e7315c90..e2747d2744 100644
--- a/web/src/components/message-input/next.tsx
+++ b/web/src/components/message-input/next.tsx
@@ -78,10 +78,27 @@ export function NextMessageInput({
 
   const thinkingOptions = useMemo(
     () => [
-      { label: t('chat.thinkingLevelUltra'), value: '3' },
-      { label: t('chat.thinkingLevelHigh'), value: '2' },
-      { label: t('chat.thinkingLevelMedium'), value: '1' },
-      { label: t('chat.thinkingLevelLow'), value: '0' },
+      {
+        label: t('chat.thinkingLevelUltra'),
+        value: '4',
+        description: t('chat.thinkingLevelUltraDescription'),
+      },
+      {
+        label: t('chat.thinkingLevelHigh'),
+        value: '3',
+        description: t('chat.thinkingLevelHighDescription'),
+      },
+      {
+        label: t('chat.thinkingLevelMedium'),
+        value: '2',
+        description: t('chat.thinkingLevelMediumDescription'),
+      },
+      {
+        label: t('chat.thinkingLevelLow'),
+        value: '1',
+        description: t('chat.thinkingLevelLowDescription'),
+      },
+      { label: t('chat.thinkingLevelNone'), value: '0' },
     ],
     [t],
   );
diff --git a/web/src/components/originui/select-with-search.tsx b/web/src/components/originui/select-with-search.tsx
index 02b9a5ab0f..38fa6ea5c3 100644
--- a/web/src/components/originui/select-with-search.tsx
+++ b/web/src/components/originui/select-with-search.tsx
@@ -31,12 +31,17 @@ import { t } from 'i18next';
 import { RAGFlowSelectOptionType } from '../ui/select';
 import { Separator } from '../ui/separator';
 
+export type SelectWithSearchOptionType = RAGFlowSelectOptionType & {
+  description?: ReactNode;
+};
+
 export type SelectWithSearchFlagOptionType = {
   label: ReactNode;
   value?: string;
   disabled?: boolean;
-  options?: RAGFlowSelectOptionType[];
+  options?: SelectWithSearchOptionType[];
   keywords?: string[];
+  description?: ReactNode;
 };
 
 export type SelectWithSearchFlagProps = {
@@ -272,12 +277,25 @@ export const SelectWithSearch = forwardRef<
                               ? `${optionTestIdPrefix}${option.value}`
                               : 'combobox-option'
                           }
-                          className={value === option.value ? 'bg-bg-card' : ''}
+                          className={cn(
+                            'relative flex flex-col min-h-10',
+                            option.description
+                              ? 'items-start gap-1'
+                              : 'justify-center items-start',
+                            value === option.value ? 'bg-bg-card' : '',
+                          )}
                         >
                           <span className="leading-none">{option.label}</span>
-
+                          {option.description && (
+                            <span className="text-text-secondary text-xs leading-none">
+                              {option.description}
+                            </span>
+                          )}
                           {value === option.value && (
-                            <CheckIcon size={16} className="ml-auto" />
+                            <CheckIcon
+                              size={16}
+                              className="absolute top-1/2 -translate-y-1/2 right-2"
+                            />
                           )}
                         </CommandItem>
                       ))}
@@ -299,14 +317,27 @@ export const SelectWithSearch = forwardRef<
                           ? `${optionTestIdPrefix}${group.value}`
                           : 'combobox-option'
                       }
-                      className={cn('mb-1 min-h-10 ', {
-                        'bg-bg-card ': value === group.value,
-                      })}
+                      className={cn(
+                        'relative flex flex-col min-h-10 mb-1',
+                        group.description
+                          ? 'items-start gap-1'
+                          : 'justify-center items-start',
+                        {
+                          'bg-bg-card ': value === group.value,
+                        },
+                      )}
                     >
                       <span className="leading-none">{group.label}</span>
-
+                      {group.description && (
+                        <span className="text-text-secondary text-xs leading-none">
+                          {group.description}
+                        </span>
+                      )}
                       {value === group.value && (
-                        <CheckIcon size={16} className="ml-auto" />
+                        <CheckIcon
+                          size={16}
+                          className="absolute top-1/2 -translate-y-1/2 right-2"
+                        />
                       )}
                     </CommandItem>
                   );
diff --git a/web/src/locales/en.ts b/web/src/locales/en.ts
index 4716b2622e..fde8b2dc84 100644
--- a/web/src/locales/en.ts
+++ b/web/src/locales/en.ts
@@ -1119,10 +1119,15 @@ This auto-tagging feature enhances retrieval by adding another layer of domain-s
       thinkingDefault: 'System default',
       thinkingEnabled: 'Enabled',
       thinkingDisabled: 'Disabled',
+      thinkingLevelNone: 'None',
       thinkingLevelLow: 'Low',
+      thinkingLevelLowDescription: 'Instant responses',
       thinkingLevelMedium: 'Medium',
+      thinkingLevelMediumDescription: 'Balanced speed & depth',
       thinkingLevelHigh: 'High',
+      thinkingLevelHighDescription: 'Deep reasoning',
       thinkingLevelUltra: 'Ultra',
+      thinkingLevelUltraDescription: 'Maximum cognitive effort',
       thinkingTip:
         'Only controls thinking mode for official Qwen, Kimi, and GLM model providers. System default disables Qwen thinking to avoid long-running tasks.',
       quote: 'Show quote',
diff --git a/web/src/locales/zh.ts b/web/src/locales/zh.ts
index f6d20dc090..736c1c442d 100644
--- a/web/src/locales/zh.ts
+++ b/web/src/locales/zh.ts
@@ -1019,10 +1019,15 @@ NER：使用 spaCy NER 和基于规则的关键词提取来抽取实体和关系
       thinkingDefault: '系统默认',
       thinkingEnabled: '开启',
       thinkingDisabled: '关闭',
+      thinkingLevelNone: '无',
       thinkingLevelLow: '轻度',
+      thinkingLevelLowDescription: '即时响应',
       thinkingLevelMedium: '中',
+      thinkingLevelMediumDescription: '平衡速度与深度',
       thinkingLevelHigh: '高',
+      thinkingLevelHighDescription: '深度推理',
       thinkingLevelUltra: '极高',
+      thinkingLevelUltraDescription: '最大认知投入',
       thinkingTip:
         '仅控制官方模型提供商中的 Qwen、Kimi 和 GLM 模型思考模式。系统默认会关闭 Qwen 思考，以避免任务长时间运行。',
       quote: '显示引文',