diff --git a/document/content/docs/upgrading/4-14/4145.mdx b/document/content/docs/upgrading/4-14/4145.mdx
index 6fa0cfbeb..95df5d844 100644
--- a/document/content/docs/upgrading/4-14/4145.mdx
+++ b/document/content/docs/upgrading/4-14/4145.mdx
@@ -17,6 +17,7 @@ description: 'FastGPT V4.14.5 更新说明'
 1. MCP 工具创建时，使用自定义鉴权头会报错。
 2. 获取对话日志列表时，如果用户头像为空，会抛错。
 3. chatAgent 未开启问题优化时，前端 UI 显示开启。
+4. 加载默认模型时，maxTokens 字段未赋值，导致模型最大响应值配置为空。
 
 
 ## 插件
diff --git a/document/data/doc-last-modified.json b/document/data/doc-last-modified.json
index 301fb3e29..a034479c5 100644
--- a/document/data/doc-last-modified.json
+++ b/document/data/doc-last-modified.json
@@ -120,7 +120,7 @@
   "document/content/docs/upgrading/4-14/4142.mdx": "2025-11-18T19:27:14+08:00",
   "document/content/docs/upgrading/4-14/4143.mdx": "2025-11-26T20:52:05+08:00",
   "document/content/docs/upgrading/4-14/4144.mdx": "2025-12-16T14:56:04+08:00",
-  "document/content/docs/upgrading/4-14/4145.mdx": "2025-12-18T11:09:13+08:00",
+  "document/content/docs/upgrading/4-14/4145.mdx": "2025-12-18T23:25:48+08:00",
   "document/content/docs/upgrading/4-8/40.mdx": "2025-08-02T19:38:37+08:00",
   "document/content/docs/upgrading/4-8/41.mdx": "2025-08-02T19:38:37+08:00",
   "document/content/docs/upgrading/4-8/42.mdx": "2025-08-02T19:38:37+08:00",
diff --git a/packages/global/core/chat/api.ts b/packages/global/core/chat/api.ts
deleted file mode 100644
index 3d66d3890..000000000
--- a/packages/global/core/chat/api.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-import type { OutLinkChatAuthType } from '../../support/permission/chat/type';
-import { OutLinkChatAuthSchema } from '../../support/permission/chat/type';
-import { ObjectIdSchema } from '../../common/type/mongo';
-import z from 'zod';
-
-export const PresignChatFileGetUrlSchema = z
-  .object({
-    key: z.string().min(1),
-    appId: ObjectIdSchema,
-    outLinkAuthData: OutLinkChatAuthSchema.optional()
-  })
-  .meta({
-    description: '获取对话文件预览链接',
-    example: {
-      key: '1234567890',
-      appId: '1234567890',
-      outLinkAuthData: {
-        shareId: '1234567890',
-        outLinkUid: '1234567890'
-      }
-    }
-  });
-export type PresignChatFileGetUrlParams = z.infer<typeof PresignChatFileGetUrlSchema> & {
-  outLinkAuthData?: OutLinkChatAuthType;
-};
-
-export const PresignChatFilePostUrlSchema = z
-  .object({
-    filename: z.string().min(1),
-    appId: ObjectIdSchema,
-    chatId: ObjectIdSchema,
-    outLinkAuthData: OutLinkChatAuthSchema.optional()
-  })
-  .meta({
-    description: '获取上传对话文件预签名 URL',
-    example: {
-      filename: '1234567890',
-      appId: '1234567890',
-      chatId: '1234567890',
-      outLinkAuthData: {
-        shareId: '1234567890',
-        outLinkUid: '1234567890'
-      }
-    }
-  });
-export type PresignChatFilePostUrlParams = z.infer<typeof PresignChatFilePostUrlSchema> & {
-  outLinkAuthData?: OutLinkChatAuthType;
-};
-
-export const UpdateChatFeedbackSchema = z
-  .object({
-    appId: z.string().min(1),
-    chatId: z.string().min(1),
-    dataId: z.string().min(1),
-    userBadFeedback: z.string().optional(),
-    userGoodFeedback: z.string().optional()
-  })
-  .meta({
-    description: '更新对话反馈',
-    example: {
-      appId: '1234567890',
-      chatId: '1234567890',
-      dataId: '1234567890',
-      userBadFeedback: '1234567890',
-      userGoodFeedback: '1234567890'
-    }
-  });
-export type UpdateChatFeedbackProps = z.infer<typeof UpdateChatFeedbackSchema>;
diff --git a/packages/global/openapi/api.ts b/packages/global/openapi/api.ts
index 169e16f75..663353445 100644
--- a/packages/global/openapi/api.ts
+++ b/packages/global/openapi/api.ts
@@ -1,9 +1,9 @@
 import { z } from 'zod';
 
 export const PaginationSchema = z.object({
-  pageSize: z.union([z.number(), z.string()]).optional(),
-  offset: z.union([z.number(), z.string()]).optional(),
-  pageNum: z.union([z.number(), z.string()]).optional()
+  pageSize: z.union([z.number(), z.string()]).optional().describe('每页条数'),
+  offset: z.union([z.number(), z.string()]).optional().describe('偏移量(与页码二选一)'),
+  pageNum: z.union([z.number(), z.string()]).optional().describe('页码(与偏移量二选一)')
 });
 export type PaginationType = z.infer<typeof PaginationSchema>;
 
diff --git a/packages/global/openapi/core/chat/api.ts b/packages/global/openapi/core/chat/api.ts
new file mode 100644
index 000000000..cb0a97a61
--- /dev/null
+++ b/packages/global/openapi/core/chat/api.ts
@@ -0,0 +1,42 @@
+import type { OutLinkChatAuthType } from '../../../support/permission/chat/type';
+import { OutLinkChatAuthSchema } from '../../../support/permission/chat/type';
+import { ObjectIdSchema } from '../../../common/type/mongo';
+import z from 'zod';
+
+export const PresignChatFileGetUrlSchema = z
+  .object({
+    key: z.string().min(1).describe('文件key'),
+    appId: ObjectIdSchema.describe('应用ID'),
+    outLinkAuthData: OutLinkChatAuthSchema.optional().describe('外链鉴权数据')
+  })
+  .meta({
+    example: {
+      key: '1234567890',
+      appId: '1234567890',
+      outLinkAuthData: {
+        shareId: '1234567890',
+        outLinkUid: '1234567890'
+      }
+    }
+  });
+export type PresignChatFileGetUrlParams = z.infer<typeof PresignChatFileGetUrlSchema>;
+
+export const PresignChatFilePostUrlSchema = z
+  .object({
+    filename: z.string().min(1).describe('文件名'),
+    appId: ObjectIdSchema.describe('应用ID'),
+    chatId: z.string().min(1).describe('对话ID'),
+    outLinkAuthData: OutLinkChatAuthSchema.optional().describe('外链鉴权数据')
+  })
+  .meta({
+    example: {
+      filename: '1234567890',
+      appId: '1234567890',
+      chatId: '1234567890',
+      outLinkAuthData: {
+        shareId: '1234567890',
+        outLinkUid: '1234567890'
+      }
+    }
+  });
+export type PresignChatFilePostUrlParams = z.infer<typeof PresignChatFilePostUrlSchema>;
diff --git a/packages/global/openapi/core/chat/feedback/index.ts b/packages/global/openapi/core/chat/feedback/index.ts
index d01622c85..2f2ea7aee 100644
--- a/packages/global/openapi/core/chat/feedback/index.ts
+++ b/packages/global/openapi/core/chat/feedback/index.ts
@@ -14,81 +14,9 @@ import {
 } from './api';
 
 export const ChatFeedbackPath: OpenAPIPath = {
-  '/core/chat/feedback/updateFeedbackReadStatus': {
-    post: {
-      summary: '更新反馈阅读状态',
-      description: '标记指定消息的反馈为已读或未读状态',
-      tags: [TagsMap.chatFeedback],
-      requestBody: {
-        content: {
-          'application/json': {
-            schema: UpdateFeedbackReadStatusBodySchema
-          }
-        }
-      },
-      responses: {
-        200: {
-          description: '成功更新反馈阅读状态',
-          content: {
-            'application/json': {
-              schema: UpdateFeedbackReadStatusResponseSchema
-            }
-          }
-        }
-      }
-    }
-  },
-  '/core/chat/feedback/adminUpdate': {
-    post: {
-      summary: '管理员标注反馈',
-      description: '管理员为指定消息添加或更新标注反馈，包含数据集关联信息',
-      tags: [TagsMap.chatFeedback],
-      requestBody: {
-        content: {
-          'application/json': {
-            schema: AdminUpdateFeedbackBodySchema
-          }
-        }
-      },
-      responses: {
-        200: {
-          description: '成功更新管理员反馈标注',
-          content: {
-            'application/json': {
-              schema: AdminUpdateFeedbackResponseSchema
-            }
-          }
-        }
-      }
-    }
-  },
-  '/core/chat/feedback/closeCustom': {
-    post: {
-      summary: '关闭自定义反馈',
-      description: '删除或关闭指定索引位置的自定义反馈条目',
-      tags: [TagsMap.chatFeedback],
-      requestBody: {
-        content: {
-          'application/json': {
-            schema: CloseCustomFeedbackBodySchema
-          }
-        }
-      },
-      responses: {
-        200: {
-          description: '成功关闭自定义反馈',
-          content: {
-            'application/json': {
-              schema: CloseCustomFeedbackResponseSchema
-            }
-          }
-        }
-      }
-    }
-  },
   '/core/chat/feedback/updateUserFeedback': {
     post: {
-      summary: '更新用户反馈',
+      summary: '添加/更新用户反馈',
       description: '用户对消息添加或更新好评/差评反馈',
       tags: [TagsMap.chatFeedback],
       requestBody: {
@@ -133,5 +61,77 @@ export const ChatFeedbackPath: OpenAPIPath = {
         }
       }
     }
+  },
+  '/core/chat/feedback/updateFeedbackReadStatus': {
+    post: {
+      summary: '应用管理员-更新反馈阅读状态',
+      description: '标记指定消息的反馈为已读或未读状态',
+      tags: [TagsMap.chatFeedback],
+      requestBody: {
+        content: {
+          'application/json': {
+            schema: UpdateFeedbackReadStatusBodySchema
+          }
+        }
+      },
+      responses: {
+        200: {
+          description: '成功更新反馈阅读状态',
+          content: {
+            'application/json': {
+              schema: UpdateFeedbackReadStatusResponseSchema
+            }
+          }
+        }
+      }
+    }
+  },
+  '/core/chat/feedback/adminUpdate': {
+    post: {
+      summary: '应用管理员-标注反馈',
+      description: '管理员为指定消息添加或更新标注反馈，包含数据集关联信息',
+      tags: [TagsMap.chatFeedback],
+      requestBody: {
+        content: {
+          'application/json': {
+            schema: AdminUpdateFeedbackBodySchema
+          }
+        }
+      },
+      responses: {
+        200: {
+          description: '成功更新管理员反馈标注',
+          content: {
+            'application/json': {
+              schema: AdminUpdateFeedbackResponseSchema
+            }
+          }
+        }
+      }
+    }
+  },
+  '/core/chat/feedback/closeCustom': {
+    post: {
+      summary: '应用管理员-关闭自定义反馈',
+      description: '删除或关闭指定索引位置的自定义反馈条目',
+      tags: [TagsMap.chatFeedback],
+      requestBody: {
+        content: {
+          'application/json': {
+            schema: CloseCustomFeedbackBodySchema
+          }
+        }
+      },
+      responses: {
+        200: {
+          description: '成功关闭自定义反馈',
+          content: {
+            'application/json': {
+              schema: CloseCustomFeedbackResponseSchema
+            }
+          }
+        }
+      }
+    }
   }
 };
diff --git a/packages/global/openapi/core/chat/history/api.ts b/packages/global/openapi/core/chat/history/api.ts
index 04a03bf12..74b2f3088 100644
--- a/packages/global/openapi/core/chat/history/api.ts
+++ b/packages/global/openapi/core/chat/history/api.ts
@@ -5,18 +5,14 @@ import { ChatSourceEnum } from '../../../../core/chat/constants';
 import { PaginationSchema, PaginationResponseSchema } from '../../../api';
 
 // Get chat histories schema
-export const GetHistoriesBodySchema = PaginationSchema.and(
-  OutLinkChatAuthSchema.and(
-    z.object({
-      appId: z.string().optional().describe('应用ID'),
-      source: z.enum(ChatSourceEnum).optional().describe('对话来源'),
-      startCreateTime: z.string().optional().describe('创建时间开始'),
-      endCreateTime: z.string().optional().describe('创建时间结束'),
-      startUpdateTime: z.string().optional().describe('更新时间开始'),
-      endUpdateTime: z.string().optional().describe('更新时间结束')
-    })
-  )
-);
+export const GetHistoriesBodySchema = PaginationSchema.extend(OutLinkChatAuthSchema.shape).extend({
+  appId: z.string().optional().describe('应用ID'),
+  source: z.enum(ChatSourceEnum).optional().describe('对话来源'),
+  startCreateTime: z.string().optional().describe('创建时间开始'),
+  endCreateTime: z.string().optional().describe('创建时间结束'),
+  startUpdateTime: z.string().optional().describe('更新时间开始'),
+  endUpdateTime: z.string().optional().describe('更新时间结束')
+});
 export type GetHistoriesBodyType = z.infer<typeof GetHistoriesBodySchema>;
 export const GetHistoriesResponseSchema = PaginationResponseSchema(
   z.object({
@@ -43,20 +39,16 @@ export const UpdateHistoryBodySchema = OutLinkChatAuthSchema.and(
 export type UpdateHistoryBodyType = z.infer<typeof UpdateHistoryBodySchema>;
 
 // Delete single chat history schema
-export const DelChatHistorySchema = OutLinkChatAuthSchema.and(
-  z.object({
-    appId: ObjectIdSchema.describe('应用ID'),
-    chatId: z.string().min(1).describe('对话ID')
-  })
-);
+export const DelChatHistorySchema = OutLinkChatAuthSchema.extend({
+  appId: ObjectIdSchema.describe('应用ID'),
+  chatId: z.string().min(1).describe('对话ID')
+});
 export type DelChatHistoryType = z.infer<typeof DelChatHistorySchema>;
 
 // Clear all chat histories schema
-export const ClearChatHistoriesSchema = OutLinkChatAuthSchema.and(
-  z.object({
-    appId: ObjectIdSchema.describe('应用ID')
-  })
-);
+export const ClearChatHistoriesSchema = OutLinkChatAuthSchema.extend({
+  appId: ObjectIdSchema.describe('应用ID')
+});
 export type ClearChatHistoriesType = z.infer<typeof ClearChatHistoriesSchema>;
 
 // Batch delete chat histories schema (for log manager)
diff --git a/packages/global/openapi/core/chat/index.ts b/packages/global/openapi/core/chat/index.ts
index 5d44ce944..48f1b5300 100644
--- a/packages/global/openapi/core/chat/index.ts
+++ b/packages/global/openapi/core/chat/index.ts
@@ -5,7 +5,7 @@ import { ChatFeedbackPath } from './feedback/index';
 import { ChatHistoryPath } from './history/index';
 import { z } from 'zod';
 import { CreatePostPresignedUrlResultSchema } from '../../../../service/common/s3/type';
-import { PresignChatFileGetUrlSchema, PresignChatFilePostUrlSchema } from '../../../core/chat/api';
+import { PresignChatFileGetUrlSchema, PresignChatFilePostUrlSchema } from './api';
 import { TagsMap } from '../../tag';
 
 export const ChatPath: OpenAPIPath = {
@@ -14,34 +14,10 @@ export const ChatPath: OpenAPIPath = {
   ...ChatFeedbackPath,
   ...ChatHistoryPath,
 
-  '/core/chat/presignChatFileGetUrl': {
-    post: {
-      summary: '获取对话文件预签名 URL',
-      description: '获取对话文件的预签名 URL',
-      tags: [TagsMap.chatPage],
-      requestBody: {
-        content: {
-          'application/json': {
-            schema: PresignChatFileGetUrlSchema
-          }
-        }
-      },
-      responses: {
-        200: {
-          description: '成功获取对话文件预签名 URL',
-          content: {
-            'application/json': {
-              schema: z.string()
-            }
-          }
-        }
-      }
-    }
-  },
   '/core/chat/presignChatFilePostUrl': {
     post: {
-      summary: '上传对话文件预签名 URL',
-      description: '上传对话文件的预签名 URL',
+      summary: '获取文件上传 URL',
+      description: '获取文件上传 URL',
       tags: [TagsMap.chatPage],
       requestBody: {
         content: {
@@ -61,5 +37,29 @@ export const ChatPath: OpenAPIPath = {
         }
       }
     }
+  },
+  '/core/chat/presignChatFileGetUrl': {
+    post: {
+      summary: '获取文件预览地址',
+      description: '获取文件预览地址',
+      tags: [TagsMap.chatPage],
+      requestBody: {
+        content: {
+          'application/json': {
+            schema: PresignChatFileGetUrlSchema
+          }
+        }
+      },
+      responses: {
+        200: {
+          description: '成功获取对话文件预签名 URL',
+          content: {
+            'application/json': {
+              schema: z.string()
+            }
+          }
+        }
+      }
+    }
   }
 };
diff --git a/packages/global/support/permission/chat.ts b/packages/global/support/permission/chat.ts
index 6bc4499eb..353116ce7 100644
--- a/packages/global/support/permission/chat.ts
+++ b/packages/global/support/permission/chat.ts
@@ -12,5 +12,5 @@ export const TeamChatAuthSchema = z.object({
 });
 export type TeamChatAuthProps = z.infer<typeof TeamChatAuthSchema>;
 
-export const OutLinkChatAuthSchema = ShareChatAuthSchema.and(TeamChatAuthSchema);
+export const OutLinkChatAuthSchema = ShareChatAuthSchema.extend(TeamChatAuthSchema.shape);
 export type OutLinkChatAuthProps = z.infer<typeof OutLinkChatAuthSchema>;
diff --git a/packages/service/core/ai/config/utils.ts b/packages/service/core/ai/config/utils.ts
index 8a1678889..3e53ef8d6 100644
--- a/packages/service/core/ai/config/utils.ts
+++ b/packages/service/core/ai/config/utils.ts
@@ -140,9 +140,13 @@ export const loadSystemModels = async (init = false, language = 'en') => {
           type: dbModel?.metadata?.type || model.type,
           isCustom: false,
 
+          ...(model.type === ModelTypeEnum.llm && {
+            maxResponse: model.maxTokens || 4000
+          }),
+
           ...(model.type === ModelTypeEnum.llm && dbModel?.metadata?.type === ModelTypeEnum.llm
             ? {
-                maxResponse: dbModel?.metadata?.maxResponse ?? model.maxTokens ?? 1000,
+                maxResponse: dbModel?.metadata?.maxResponse ?? model.maxTokens ?? 4000,
                 defaultConfig: mergeObject(model.defaultConfig, dbModel?.metadata?.defaultConfig),
                 fieldMap: mergeObject(model.fieldMap, dbModel?.metadata?.fieldMap),
                 maxTokens: undefined
diff --git a/projects/app/src/pages/api/core/chat/presignChatFileGetUrl.ts b/projects/app/src/pages/api/core/chat/presignChatFileGetUrl.ts
index fc5b8a32b..5658d1dca 100644
--- a/projects/app/src/pages/api/core/chat/presignChatFileGetUrl.ts
+++ b/projects/app/src/pages/api/core/chat/presignChatFileGetUrl.ts
@@ -2,7 +2,7 @@ import type { ApiRequestProps } from '@fastgpt/service/type/next';
 import { NextAPI } from '@/service/middleware/entry';
 import { getS3ChatSource } from '@fastgpt/service/common/s3/sources/chat';
 import { authChatCrud } from '@/service/support/permission/auth/chat';
-import type { PresignChatFileGetUrlParams } from '@fastgpt/global/core/chat/api';
+import type { PresignChatFileGetUrlParams } from '@fastgpt/global/openapi/core/chat/api';
 
 async function handler(req: ApiRequestProps<PresignChatFileGetUrlParams>): Promise<string> {
   const { key, appId, outLinkAuthData } = req.body;
diff --git a/projects/app/src/pages/api/core/chat/presignChatFilePostUrl.ts b/projects/app/src/pages/api/core/chat/presignChatFilePostUrl.ts
index 394e9be9f..d918bc93f 100644
--- a/projects/app/src/pages/api/core/chat/presignChatFilePostUrl.ts
+++ b/projects/app/src/pages/api/core/chat/presignChatFilePostUrl.ts
@@ -5,7 +5,7 @@ import { getS3ChatSource } from '@fastgpt/service/common/s3/sources/chat';
 import { authChatCrud } from '@/service/support/permission/auth/chat';
 import { authFrequencyLimit } from '@/service/common/frequencyLimit/api';
 import { addSeconds } from 'date-fns';
-import type { PresignChatFilePostUrlParams } from '@fastgpt/global/core/chat/api';
+import type { PresignChatFilePostUrlParams } from '@fastgpt/global/openapi/core/chat/api';
 
 const authUploadLimit = (tmbId: string) => {
   if (!global.feConfigs.uploadFileMaxAmount) return;