diff --git a/web/src/i18n/en.ts b/web/src/i18n/en.ts
index 72dd701d..31354817 100644
--- a/web/src/i18n/en.ts
+++ b/web/src/i18n/en.ts
@@ -1534,6 +1534,8 @@ export const en = {
       uploadCover: 'Import and Overwrite',
       refresh: 'Refresh Current Page',
       json_output: 'Support JSON formatted output',
+      thinking_budget_tokens: 'thinking budget tokens',
+      thinking_budget_tokens_max_error: "Cannot exceed the max tokens limit ({{max}})",
     },
     userMemory: {
       userMemory: 'User Memory',
diff --git a/web/src/i18n/zh.ts b/web/src/i18n/zh.ts
index 88b919ba..d802b731 100644
--- a/web/src/i18n/zh.ts
+++ b/web/src/i18n/zh.ts
@@ -864,6 +864,8 @@ export const zh = {
       uploadCover: '导入并覆盖',
       refresh: '刷新当前页',
       json_output: '支持JSON格式化输出',
+      thinking_budget_tokens: '深度思考预算Token数',
+      thinking_budget_tokens_max_error: "不能超过 最大令牌数 ({{max}})",
     },
     table: {
       totalRecords: '共 {{total}} 条记录'
diff --git a/web/src/views/ApplicationConfig/components/Chat.tsx b/web/src/views/ApplicationConfig/components/Chat.tsx
index 04391532..b4fefdc9 100644
--- a/web/src/views/ApplicationConfig/components/Chat.tsx
+++ b/web/src/views/ApplicationConfig/components/Chat.tsx
@@ -218,17 +218,22 @@ const Chat: FC<ChatProps> = ({
         const modelChatList = [...prev]
         const curModelChat = modelChatList[targetIndex]
         const curChatMsgList = curModelChat.list || []
-        const lastMsg = curChatMsgList[curChatMsgList.length - 2]
-        modelChatList[targetIndex] = {
-          ...modelChatList[targetIndex],
-          list: [
-            ...curChatMsgList.slice(0, curChatMsgList.length - 2),
-            {
-              ...lastMsg,
-              ...(lastMsg.role === 'user' ? { status: 'error' } : { content: null })
-            }
-          ]
+        const lastUserMsg = curChatMsgList[curChatMsgList.length - 2]
+        const lastAssistantMsg = curChatMsgList[curChatMsgList.length - 1]
+
+        if (!lastAssistantMsg.meta_data?.reasoning_content || lastAssistantMsg.meta_data?.reasoning_content.length === 0) {
+          modelChatList[targetIndex] = {
+            ...modelChatList[targetIndex],
+            list: [
+              ...curChatMsgList.slice(0, curChatMsgList.length - 2),
+              {
+                ...lastUserMsg,
+                ...(lastUserMsg.role === 'user' ? { status: 'error' } : { content: null })
+              }
+            ]
+          }
         }
+
         return [...modelChatList]
       }
 
diff --git a/web/src/views/ApplicationConfig/components/ModelConfigModal.tsx b/web/src/views/ApplicationConfig/components/ModelConfigModal.tsx
index 2d330e9f..9c5935c5 100644
--- a/web/src/views/ApplicationConfig/components/ModelConfigModal.tsx
+++ b/web/src/views/ApplicationConfig/components/ModelConfigModal.tsx
@@ -108,7 +108,8 @@ const ModelConfigModal = forwardRef<ModelConfigModalRef, ModelConfigModalProps>(
     const newValues: ModelConfig = {
       capability: (option as Model).capability,
       deep_thinking: false,
-      json_output: false
+      thinking_budget_tokens: undefined,
+      json_output: false,
     }
     if (source === 'chat') {
       newValues.label = (option as Model).name
@@ -124,8 +125,8 @@ const ModelConfigModal = forwardRef<ModelConfigModalRef, ModelConfigModalProps>(
 
   useEffect(() => {
     const { deep_thinking: _, json_output: __, ...rest } = data?.model_parameters || {}
-    form.setFieldsValue(rest)
-  }, [values?.default_model_config_id])
+    form.setFieldsValue({ ...rest })
+  }, [data?.default_model_config_id])
 
   const handleReset = () => {
     if (!id) return
@@ -167,11 +168,36 @@ const ModelConfigModal = forwardRef<ModelConfigModalRef, ModelConfigModalProps>(
         {['model', 'chat'].includes(source) && <>
           <FormItem name="capability" hidden />
         </>}
+        <FormItem name="json_output" valuePropName="checked" hidden={!(values?.capability?.includes('json_output'))}>
+          <Checkbox>{t('application.json_output')}</Checkbox>
+        </FormItem>
         <FormItem name="deep_thinking" valuePropName="checked" hidden={!['model', 'chat'].includes(source) || !(values?.deep_thinking || values?.capability?.includes('thinking'))}>
           <Checkbox>{t('application.deep_thinking')}</Checkbox>
         </FormItem>
-        <FormItem name="json_output" valuePropName="checked" hidden={!(values?.capability?.includes('json_output'))}>
-          <Checkbox>{t('application.json_output')}</Checkbox>
+        <FormItem
+          name="thinking_budget_tokens"
+          label={t('application.thinking_budget_tokens')}
+          hidden={!['model', 'chat'].includes(source) || !(values?.deep_thinking || values?.capability?.includes('thinking'))}
+          rules={[
+            { required: values?.deep_thinking, message: t('common.pleaseEnter') },
+            {
+              validator: (_, value) => {
+                const maxTokens = values?.max_tokens
+                if (value !== undefined && maxTokens !== undefined && value > maxTokens) {
+                  return Promise.reject(t('application.thinking_budget_tokens_max_error', { max: maxTokens }))
+                }
+                return Promise.resolve()
+              }
+            }
+          ]}
+        >
+          <RbSlider
+            step={0}
+            min={0}
+            max={32000}
+            isInput={true}
+            disabled={!values?.deep_thinking}
+          />
         </FormItem>
         {source === 'chat' && <FormItem name="label" hidden />}
 
diff --git a/web/src/views/ApplicationConfig/types.ts b/web/src/views/ApplicationConfig/types.ts
index 3b2755a9..1b54d3aa 100644
--- a/web/src/views/ApplicationConfig/types.ts
+++ b/web/src/views/ApplicationConfig/types.ts
@@ -38,6 +38,7 @@ export interface ModelConfig {
   /** Stop sequences */
   stop?: string;
   deep_thinking?: boolean;
+  thinking_budget_tokens?: number;
   json_output?: boolean;
 }