diff --git a/contrib/llvm-project/libcxx/include/__config b/contrib/llvm-project/libcxx/include/__config
index 2eada10e96ce8e..8248cf3d2239d0 100644
--- a/contrib/llvm-project/libcxx/include/__config
+++ b/contrib/llvm-project/libcxx/include/__config
@@ -64,7 +64,7 @@
 // _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.
 // Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is
 // defined to XXYYZZ.
-#  define _LIBCPP_VERSION 180000
+#  define _LIBCPP_VERSION 180100
 
 #  define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y
 #  define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)
diff --git a/lib/clang/include/VCSVersion.inc b/lib/clang/include/VCSVersion.inc
index c4390452d81373..ca4f5d50df1400 100644
--- a/lib/clang/include/VCSVersion.inc
+++ b/lib/clang/include/VCSVersion.inc
@@ -1,8 +1,8 @@
-#define LLVM_REVISION "llvmorg-18-init-18359-g93248729cfae"
+#define LLVM_REVISION "llvmorg-18-init-18361-g22683463740e"
 #define LLVM_REPOSITORY "https://github.com/llvm/llvm-project.git"
 
-#define CLANG_REVISION "llvmorg-18-init-18359-g93248729cfae"
+#define CLANG_REVISION "llvmorg-18-init-18361-g22683463740e"
 #define CLANG_REPOSITORY "https://github.com/llvm/llvm-project.git"
 
-#define LLDB_REVISION "llvmorg-18-init-18359-g93248729cfae"
+#define LLDB_REVISION "llvmorg-18-init-18361-g22683463740e"
 #define LLDB_REPOSITORY "https://github.com/llvm/llvm-project.git"
diff --git a/lib/clang/include/clang/Basic/Version.inc b/lib/clang/include/clang/Basic/Version.inc
index adf6c5966121b5..26d6b3b2938f33 100644
--- a/lib/clang/include/clang/Basic/Version.inc
+++ b/lib/clang/include/clang/Basic/Version.inc
@@ -1,8 +1,8 @@
-#define	CLANG_VERSION			18.0.0git
-#define	CLANG_VERSION_STRING		"18.0.0git"
+#define	CLANG_VERSION			18.1.0rc
+#define	CLANG_VERSION_STRING		"18.1.0rc"
 #define	CLANG_VERSION_MAJOR		18
 #define	CLANG_VERSION_MAJOR_STRING	"18"
-#define	CLANG_VERSION_MINOR		0
+#define	CLANG_VERSION_MINOR		1
 #define	CLANG_VERSION_PATCHLEVEL	0
 
 #define	CLANG_VENDOR			"FreeBSD "
diff --git a/lib/clang/include/lld/Common/Version.inc b/lib/clang/include/lld/Common/Version.inc
index 1ffb3458abd0e1..ff41eaf5ebbe5a 100644
--- a/lib/clang/include/lld/Common/Version.inc
+++ b/lib/clang/include/lld/Common/Version.inc
@@ -1,4 +1,4 @@
 // Local identifier in __FreeBSD_version style
 #define LLD_FREEBSD_VERSION 1400006
 
-#define LLD_VERSION_STRING "18.0.0 (FreeBSD llvmorg-18-init-18359-g93248729cfae-" __XSTRING(LLD_FREEBSD_VERSION) ")"
+#define LLD_VERSION_STRING "18.1.0 (FreeBSD llvmorg-18-init-18361-g22683463740e-" __XSTRING(LLD_FREEBSD_VERSION) ")"
diff --git a/lib/clang/include/lldb/Version/Version.inc b/lib/clang/include/lldb/Version/Version.inc
index c5e07a4eefbd98..7a9546b4696f16 100644
--- a/lib/clang/include/lldb/Version/Version.inc
+++ b/lib/clang/include/lldb/Version/Version.inc
@@ -1,6 +1,6 @@
-#define LLDB_VERSION 18.0.0git
-#define LLDB_VERSION_STRING "18.0.0git"
+#define LLDB_VERSION 18.1.0rc
+#define LLDB_VERSION_STRING "18.1.0rc"
 #define LLDB_VERSION_MAJOR 18
-#define LLDB_VERSION_MINOR 0
+#define LLDB_VERSION_MINOR 1
 #define LLDB_VERSION_PATCH 0
 /* #undef LLDB_FULL_VERSION_STRING */
diff --git a/lib/clang/include/llvm/Config/config.h b/lib/clang/include/llvm/Config/config.h
index fdc104e4923177..718c44fff94d54 100644
--- a/lib/clang/include/llvm/Config/config.h
+++ b/lib/clang/include/llvm/Config/config.h
@@ -344,10 +344,10 @@
 #define PACKAGE_NAME "LLVM"
 
 /* Define to the full name and version of this package. */
-#define PACKAGE_STRING "LLVM 18.0.0git"
+#define PACKAGE_STRING "LLVM 18.1.0rc"
 
 /* Define to the version of this package. */
-#define PACKAGE_VERSION "18.0.0git"
+#define PACKAGE_VERSION "18.1.0rc"
 
 /* Define to the vendor of this package. */
 /* #undef PACKAGE_VENDOR */
diff --git a/lib/clang/include/llvm/Config/llvm-config.h b/lib/clang/include/llvm/Config/llvm-config.h
index f3555d0868e2ca..111e0a296ed5fd 100644
--- a/lib/clang/include/llvm/Config/llvm-config.h
+++ b/lib/clang/include/llvm/Config/llvm-config.h
@@ -177,13 +177,13 @@
 #define LLVM_VERSION_MAJOR 18
 
 /* Minor version of the LLVM API */
-#define LLVM_VERSION_MINOR 0
+#define LLVM_VERSION_MINOR 1
 
 /* Patch version of the LLVM API */
 #define LLVM_VERSION_PATCH 0
 
 /* LLVM version string */
-#define LLVM_VERSION_STRING "18.0.0git"
+#define LLVM_VERSION_STRING "18.1.0rc"
 
 /* Whether LLVM records statistics for use with GetStatistics(),
  * PrintStatistics() or PrintStatisticsJSON()
diff --git a/lib/clang/include/llvm/Support/VCSRevision.h b/lib/clang/include/llvm/Support/VCSRevision.h
index 7cc55b62be19db..fa5c1df7135723 100644
--- a/lib/clang/include/llvm/Support/VCSRevision.h
+++ b/lib/clang/include/llvm/Support/VCSRevision.h
@@ -1,2 +1,2 @@
-#define LLVM_REVISION "llvmorg-18-init-18359-g93248729cfae"
+#define LLVM_REVISION "llvmorg-18-init-18361-g22683463740e"
 #define LLVM_REPOSITORY "https://github.com/llvm/llvm-project.git"