Following yesterday's release of the Qt 6.12 LTS toolkit, The Qt Group today released Qt Creator 21 in beta form as the latest version of their integrated development environment focused on C/C++ as well as Python, JavaScript, and other programming languages.

As with prior Qt Creator releases, Qt Creator 21 continues laying on the AI features. With Qt Creator 21, the Agent Communication Protocol (ACP) and Model Context Protocol (MCP) servers are enabled by default in further pushing the company's AI goals.

Qt Creator 21 Beta also brings support for the ACP version 2 protocol, improvements to the ACP chat functionality with a variety of new features, MCP 2026-07-28 protocol support, and enabling many new MCP tools with further configurations exposed through the preferences.

Outside of their AI scope, Qt Creator 21 Beta adds an editor for .qdoc files, diff view for single files is now editable inline, fixes to the FakeVim support, and project handling improvements.

Qt Creator 21 Beta also introduces experimental support for China's HarmonyOS, experimental support for remote WIndows devices over SSH, and support for containers managed via Podman.

Downloads and more details on the Qt Creator 21 IDE beta via Qt.io.