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An optimized BLAS library

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OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version. Please read the documents on OpenBLAS wiki.

Binary Packages

We strive to provide binary packages for the following platform.

(hosted on; if required the mingw runtime dependencies can be found in the 0.2.12 folder there)
Note that while the binaries may be slow to arrive on at the moment, they can also be found in the Releases section of the github site, Binaries for other platforms are usually available on the sites listed in the OpenBLAS Wiki

Install from Source

Please read User Manual and Installation Guide


The current release is 0.3.20 version created Feb 20, 2022. Please check the changelog file. Here is the single thread DGEMM performance result on desktop Sandy Bridge.




Current Developers: Zhang Xianyi, Martin Kroeker

Previous Developers:


Please check


Please use the issue tracker at for bug reports and suggestions.


Please read our wiki pages.


Please read this wiki page.


Users mailing list


You can download this project in either zip or tar formats.
(md5 checksums are 33526b15e15971edb657edc15de0c67f for the zip and abfaa43d995046ca4c56ccf14165c93c for the tar.gz package)

You can also clone the project with Git by running:

$ git clone