Each OpenStack release has a name, in increasing alphabetical order (e.g., Havana follows Grizzly). There are also version numbers corresponding to these releases, as shown in the table below. Click on a release name in the table (e.g., Grizzly) for the release notes, which are hosted on the OpenStack wiki.
| Release name | Release date | OpenStack version number for Block Storage, Compute, Identity, Image, and Networking | OpenStack Object Storage version number |
| Havana | October 2013 | 2013.3 | unknown |
| Grizzly | April 2013 | 2013.1 | 1.7.6 |
| Folsom | October 2012 | 2012.2 | 1.7.2 |
| Essex | April 2012 | 2012.1 | 1.4.8 |
| Diablo | October 2011 | 2011.3 | 1.4.3 |
| Cactus | April 2011 | 2011.2 | 1.3.0 |
| Bexar | March 2011 | 2011.1 | 1.2.0 |
| Austin | October 2010 | 0.9.0 | 1.0.0 |
Beginning with the Cactus release, OpenStack adopted a six month release schedule. The Havana release is scheduled for October 2013.
