diff --git a/clang/docs/OpenMPSupport.rst b/clang/docs/OpenMPSupport.rst
--- a/clang/docs/OpenMPSupport.rst
+++ b/clang/docs/OpenMPSupport.rst
@@ -26,7 +26,8 @@
 In addition, the LLVM OpenMP runtime `libomp` supports the OpenMP Tools
 Interface (OMPT) on x86, x86_64, AArch64, and PPC64 on Linux, Windows, and macOS.
 
-For the list of supported features from OpenMP 5.0 see `OpenMP implementation details`_.
+For the list of supported features from OpenMP 5.0 and 5.1
+see `OpenMP implementation details`_ and `OpenMP 51 implementation details`_.
 
 General improvements
 ====================
@@ -252,6 +253,8 @@
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 
 
+.. _OpenMP 51 implementation details:
+
 OpenMP 5.1 Implementation Details
 =================================
 
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -3200,7 +3200,7 @@
 def fopenmp_version_EQ : Joined<["-"], "fopenmp-version=">, Group<f_Group>,
   Flags<[NoArgumentUnused]>,
   Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
-  HelpText<"Set OpenMP version (e.g. 45 for OpenMP 4.5, 50 for OpenMP 5.0). Default value is 50 for Clang and 11 for Flang">;
+  HelpText<"Set OpenMP version (e.g. 45 for OpenMP 4.5, 51 for OpenMP 5.1). Default value is 51 for Clang">;
 defm openmp_extensions: BoolFOption<"openmp-extensions",
   LangOpts<"OpenMPExtensions">, DefaultTrue,
   PosFlag<SetTrue, [NoArgumentUnused], [ClangOption, CC1Option],
diff --git a/flang/test/Driver/driver-help-hidden.f90 b/flang/test/Driver/driver-help-hidden.f90
--- a/flang/test/Driver/driver-help-hidden.f90
+++ b/flang/test/Driver/driver-help-hidden.f90
@@ -74,7 +74,7 @@
 ! CHECK-NEXT: -fopenmp-targets=<value>
 ! CHECK-NEXT:                         Specify comma-separated list of triples OpenMP offloading targets to be supported
 ! CHECK-NEXT: -fopenmp-version=<value>
-! CHECK-NEXT:                         Set OpenMP version (e.g. 45 for OpenMP 4.5, 50 for OpenMP 5.0). Default value is 50 for Clang and 11 for Flang
+! CHECK-NEXT:                         Set OpenMP version (e.g. 45 for OpenMP 4.5, 51 for OpenMP 5.1). Default value is 51 for Clang
 ! CHECK-NEXT: -fopenmp                Parse OpenMP pragmas and generate parallel code.
 ! CHECK-NEXT: -foptimization-record-file=<file>
 ! CHECK-NEXT:                         Specify the output name of the file containing the optimization remarks. Implies -fsave-optimization-record. On Darwin platforms, this cannot be used with multiple -arch <arch> options.
diff --git a/flang/test/Driver/driver-help.f90 b/flang/test/Driver/driver-help.f90
--- a/flang/test/Driver/driver-help.f90
+++ b/flang/test/Driver/driver-help.f90
@@ -62,7 +62,7 @@
 ! HELP-NEXT: -fopenmp-targets=<value>
 ! HELP-NEXT:                         Specify comma-separated list of triples OpenMP offloading targets to be supported
 ! HELP-NEXT: -fopenmp-version=<value>
-! HELP-NEXT:                         Set OpenMP version (e.g. 45 for OpenMP 4.5, 50 for OpenMP 5.0). Default value is 50 for Clang and 11 for Flang
+! HELP-NEXT:                         Set OpenMP version (e.g. 45 for OpenMP 4.5, 51 for OpenMP 5.1). Default value is 51 for Clang
 ! HELP-NEXT: -fopenmp                Parse OpenMP pragmas and generate parallel code.
 ! HELP-NEXT: -foptimization-record-file=<file>
 ! HELP-NEXT:                         Specify the output name of the file containing the optimization remarks. Implies -fsave-optimization-record. On Darwin platforms, this cannot be used with multiple -arch <arch> options.
@@ -202,7 +202,7 @@
 ! HELP-FC1-NEXT:                         Generate code only for an OpenMP target device.
 ! HELP-FC1-NEXT: -fopenmp-target-debug   Enable debugging in the OpenMP offloading device RTL
 ! HELP-FC1-NEXT: -fopenmp-version=<value>
-! HELP-FC1-NEXT:                         Set OpenMP version (e.g. 45 for OpenMP 4.5, 50 for OpenMP 5.0). Default value is 50 for Clang and 11 for Flang
+! HELP-FC1-NEXT:                         Set OpenMP version (e.g. 45 for OpenMP 4.5, 51 for OpenMP 5.1). Default value is 51 for Clang
 ! HELP-FC1-NEXT: -fopenmp                Parse OpenMP pragmas and generate parallel code.
 ! HELP-FC1-NEXT: -fpass-plugin=<dsopath> Load pass plugin from a dynamic shared object file (only with new pass manager).
 ! HELP-FC1-NEXT: -fppc-native-vector-element-order
diff --git a/openmp/docs/CommandLineArgumentReference.rst b/openmp/docs/CommandLineArgumentReference.rst
--- a/openmp/docs/CommandLineArgumentReference.rst
+++ b/openmp/docs/CommandLineArgumentReference.rst
@@ -37,8 +37,7 @@
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 Set the OpenMP version to a specific version ``<arg>`` of the OpenMP standard. 
 For example, you may use ``-fopenmp-version=45`` to select version 4.5 of 
-the OpenMP standard. The default value is ``-fopenmp-version=50`` for ``Clang`` 
-and ``-fopenmp-version=11`` for ``flang-new``.
+the OpenMP standard. The default value is ``-fopenmp-version=51`` for ``Clang``.
 
 .. _offload_command_line_arguments: