# Dify 0.5.1 — Release & Upgrade Intelligence
- **Product:** Dify (https://dify.ai)
- **Version:** 0.5.1
- **Released:** Jan 25, 2024
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/dify/updates/0.5.1/

## Executive Summary (TL;DR)
Dify 0.5.1. Source highlight: add multiple LLM debug mode ⚔️

## New Features
- feat: utm supports.
- feat: add tool labels
- Add tongyi tts&tts function optimization
- feat: abab6-chat supported
- feat: multiple model configuration
- Feat/zhipuai function calling

## Improvements
- improve api docker file and lock Debian version in base image tag

## Bug Fixes
- add multiple LLM debug mode ⚔️
- fix: transcript asr params wrong
- fix: empty usage
- fix: credentials validate compatible problem
- fix: knowledge api doc
- fix: filename cause windows import error