Windows NT 4.0 build 1381.1

Windows NT 4.0 build 1381.1 is the official RTM build of Windows NT 4.0, which was released on 24 August 1996. This is the recompile from 3 August and the official RTM, but there is also an earlier compile from 27 July that was apparently recalled due to a bug.

Japanese evaluation version
On 29 November 2021, Blue Horizon provided a Japanese evaluation version of this build, with several notable differences compared to other variants. Both the Server and Workstation SKUs have bitmap backgrounds that identify as "Pre-Release for Evaluation", as well as additional CDs for both SKUs containing bug reporting tools.