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Quantum Toolbox in Python

QuTiP has been developed over seven years by volunteers working in their spare time. If you find QuTiP useful, please consider taking a minute of your own time and citing it in your publications.


The recommended way to install QuTiP is with conda or pip, see the documentation for details .

Latest release

Version 4.5.0 - 31 January 2020

Previous releases

Version 4.4.1 - 13 Aug 2019

Version 4.4.0 - 04 July 2019

Version 4.3.1 - 18 July 2018

If you are interested in legacy releases of QuTiP, you can download all previous versions from the GitHub page by selecting the desired source branch.


Instructions for installing QuTiP can be found in the documentation, or in the INSTALL.txt file included in the QuTiP source folder.

Source Code

If you want to checkout the latest source code and documentation then head on over to the QuTiP repositories at