Apple has today released the eighth version of its iOS 5 beta to developers. This new version is the Gold Master or  GM build of iOS 5, this is usually the final version before official release of an iOS version.

iOs 5 is set to be released next week on Wednesday, October 12th.

The iOs 5 beta build is version 9A334. Apple has also released Xcode 4.2 Gold Master build 4D199 to developers.

The iOS 5 beta is available for download now on the Apple Developer site. Note that Apple requires that you have a developer account and a device registered on the site in order to download and install iOS 5.

This new version of iOS 5 contains features of iOS like iMessagesTwitterSetup and Notification CenteriCloud and alerts. It also contains the Siri assistant feature announced today, but that is compatible only with Apple’s iPhone 4S, a new device being released on October 14th and available for pre-order on October 7th.