The latest version of Qt is 6.5 released on 3 April 2023. Also still supported, for commercial users, are 5.15 LTS, released on 26 May 2020, and 6.2 LTS, released on 30 September 2021 –

long-term support Long-term support (LTS) is a product lifecycle management policy in which a stable release of computer software is maintained for a longer period of time than the standard edition. The term is typically reserved for open-source software, where i ...

(LTS) versions are generally supported for three years, with a commercial license, while 5.15 support was extended to five years, so it is supported for longer or until 26 May 2025. In addition the

KDE KDE is an international Free software movement, free software community that develops free and open-source software. As a central development hub, it provides tools and resources that allow collaborative work on this kind of software. Well-know ...

project provides unofficial support for, at least, Qt 5.15, i.e. not just for commercial users. A regular release only receives patch releases during the first 6 months, until the next feature release is out, while an LTS release receives patch releases also after the next feature release is available. Starting with 5.15 LTS, LTS releases are available only to the commercial license holders. For open source users, such LTS releases are available as regular releases only, thus 5.15 is now in the commercial-only LTS phase. Qt 5.12 LTS was the last Qt version to offer an offline installer. Qt 6.5 will be the next LTS version.

Pre-releases and Qt 1

Qt 2

Qt 3

Qt 4

Qt 4 was first released in 2005 and has been unsupported since 2015.

Qt 5

Qt 5 was officially released on 19 December 2012. This new version marked a major change in the platform, with hardware-accelerated graphics,

QML QML (Qt Modeling Language) is a user interface markup language. It is a declarative language (similar to CSS and JSON) for designing user interface–centric applications. Inline JavaScript code handles imperative aspects. It is associated wi ...

and

JavaScript JavaScript (), often abbreviated as JS, is a programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS. As of 2022, 98% of Website, websites use JavaScript on the Client (computing), client side ...

playing a major role. The traditional C++-only QWidgets continued to be supported, but did not benefit from the performance improvements available through the new architecture. Qt 5 brings significant improvements to the speed and ease of developing user interfaces. Framework development of Qt 5 moved to open governance, taking place at qt-project.org. It is now possible for developers outside Digia to submit patches and have them reviewed. The

project provides unofficial support for Qt 5.15 in the form of a collection of bugfix patches, most of which are backported from Qt 6. As KDE has a policy of not assigning version numbers to their patches,

Linux distributions A Linux distribution (often abbreviated as distro) is an operating system made from a software collection that includes the Linux kernel and, often, a package management system. Linux users usually obtain their operating system by downloading one ...

use ad-hoc schemes when using this fork of Qt5:

OpenSUSE openSUSE () is a free and open-source software, free and open source RPM Package Manager, RPM-based Linux distribution developed by the openSUSE project. The initial release of the community project was a beta version of SUSE Linux 10.0. Addi ...

, for example, calls its June 2021 version "5.15.2+kde200".

Qt 6

Qt 6 was officially released on December 8, 2020.

Notes

: On 14 October 2016,

's 20th anniversary, a KDE developer re-released a variant of Qt 1.45 that he made work with modern Linux systems.

References

External links

Qt downloads archive
{{Qt Qt (software) Software version histories