What is JAGS?

JAGS is Just Another Gibbs Sampler.  It is a program for analysis of Bayesian hierarchical models using Markov Chain Monte Carlo (MCMC) simulation  not wholly unlike BUGS.  JAGS was written with three aims in mind:
JAGS is licensed under the GNU General Public License version 2. You may freely modify and redistribute it under certain conditions (see the file COPYING for details).


See the JAGS NEWS blog for news about the project.  If you want to be kept informed of updates to JAGS, then subscribe to the RSS news feed.

Latest version

The latest release is JAGS 4.3.0.  It was released on July 18 2017.


To download JAGS, please visit the files page of the mcmc-jags project at sourceforge.  You will find the source for JAGS there as well as binary packages for Mac OS X (Thanks to Matt Denwood and the pioneering work of Bill Northcott) and Windows. 

Binaries for Linux are distributed separately.  There are packages for various RPM-based Linux distributions (RHEL 5, 6, 7; OpenSuSE 13.1, 13.2, TumbleWeed; CentOS 5, 6, 7; Fedora 20)  (Thanks to Lars Vilhuber),  Debian and the development version of Ubuntu (Thanks to Dirk Eddelbuettel).  You can track the current status of the Debian packages here. Another Ubuntu repository for older versions of Ubuntu is provided by Michael Rutter.  

Daniel Meliza also maintains a port of JAGS on MacPorts.

Development version

The JAGS source code is hosted on a Mercurial repository at Sourceforge. If you want to keep track of the development version, you can find downloading instructions here.


Last updated 14 September 2017.

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