---
title: 'V4.14.8'
description: 'FastGPT V4.14.8 Release Notes'
---

## Upgrade Guide

### Update Images

- FastGPT image tag: v4.14.8
- FastGPT commercial image tag: v4.14.8
- fastgpt-plugin image tag: no update needed
- mcp_server: no update needed
- sandbox image tag: v4.14.8
- AIProxy: no update needed
- mongo: no update needed

## 🚀 New Features

1. Upgraded Next.js to version 16 with rspack for local development, delivering 3–5× faster local development performance.
2. Refactored the code sandbox with a unified isolation model, adding support for network requests and built-in dependency packages.

## ⚙️ Improvements

1. MCP JSON Schema `type` fields no longer need to be restricted to enum values.
2. Updated the variable reference label in Knowledge Base search to use clearer, more intuitive wording.

## 🐛 Bug Fixes

1. New SDK compatibility: fixed errors caused by multiple connections when calling the same MCP service consecutively.
2. Fixed incorrect ordering of text and tool outputs after saving when both are produced simultaneously.
3. Fixed variable update logic where `$1` in input values was incorrectly replaced by a regex capture group.
4. API Knowledge Base now returns the `title` of the uploaded file in the response; if no `title` was provided, the field is omitted.
