diff --git a/.github/workflows/benchmarks.yml b/.github/workflows/benchmarks.yml
index 532a03e45b5..ea27bd4080e 100644
--- a/.github/workflows/benchmarks.yml
+++ b/.github/workflows/benchmarks.yml
@@ -22,6 +22,10 @@ on:
         type: boolean
         description: "Boolean to enable the Linux 6.0 Swift version matrix job. Defaults to true."
         default: true
+      linux_6_1_enabled:
+        type: boolean
+        description: "Boolean to enable the Linux 6.1 Swift version matrix job. Defaults to true."
+        default: true
       linux_nightly_6_0_enabled:
         type: boolean
         description: "⚠️  Deprecated, we no longer run against 6.0 nightly."
@@ -43,6 +47,10 @@ on:
         type: boolean
         description: "Boolean to enable the Windows 6.0 Swift version matrix job. Currently has no effect!"  # TODO: implement Windows benchmarking
         default: false
+      windows_6_1_enabled:
+        type: boolean
+        description: "Boolean to enable the Windows 6.1 Swift version matrix job. Currently has no effect!"  # TODO: implement Windows benchmarking
+        default: false
       windows_nightly_6_0_enabled:
         type: boolean
         description: "⚠️  Deprecated, we no longer run against 6.0 nightly."  # TODO: implement Windows benchmarking
@@ -71,6 +79,7 @@ jobs:
           MATRIX_LINUX_5_9_ENABLED: ${{ inputs.linux_5_9_enabled }}
           MATRIX_LINUX_5_10_ENABLED: ${{ inputs.linux_5_10_enabled }}
           MATRIX_LINUX_6_0_ENABLED: ${{ inputs.linux_6_0_enabled }}
+          MATRIX_LINUX_6_1_ENABLED: ${{ inputs.linux_6_1_enabled }}
           MATRIX_LINUX_NIGHTLY_NEXT_ENABLED: ${{ inputs.linux_nightly_6_1_enabled && inputs.linux_nightly_next_enabled  }}
           MATRIX_LINUX_NIGHTLY_MAIN_ENABLED: ${{ inputs.linux_nightly_main_enabled }}
 
diff --git a/.github/workflows/cxx_interop.yml b/.github/workflows/cxx_interop.yml
index 4b6caf8a477..b92c3fb0bd9 100644
--- a/.github/workflows/cxx_interop.yml
+++ b/.github/workflows/cxx_interop.yml
@@ -15,6 +15,10 @@ on:
         type: boolean
         description: "Boolean to enable the Linux 6.0 Swift version matrix job. Defaults to true."
         default: true
+      linux_6_1_enabled:
+        type: boolean
+        description: "Boolean to enable the Linux 6.1 Swift version matrix job. Defaults to true."
+        default: true
       linux_nightly_6_0_enabled:
         type: boolean
         description: "⚠️  Deprecated, we no longer run against 6.0 nightly."
@@ -36,6 +40,10 @@ on:
         type: boolean
         description: "Boolean to enable the Windows 6.0 Swift version matrix job. Defaults to false. Currently has no effect!"  # TODO: implement Windows Cxx compat checking
         default: false
+      windows_6_1_enabled:
+        type: boolean
+        description: "Boolean to enable the Windows 6.1 Swift version matrix job. Defaults to false. Currently has no effect!"  # TODO: implement Windows Cxx compat checking
+        default: false
       windows_nightly_6_0_enabled:
         type: boolean
         description: "⚠️  Deprecated, we no longer run against 6.0 nightly."  # TODO: implement Windows Cxx compat checking
@@ -64,6 +72,7 @@ jobs:
           MATRIX_LINUX_5_9_ENABLED: ${{ inputs.linux_5_9_enabled }}
           MATRIX_LINUX_5_10_ENABLED: ${{ inputs.linux_5_10_enabled }}
           MATRIX_LINUX_6_0_ENABLED: ${{ inputs.linux_6_0_enabled }}
+          MATRIX_LINUX_6_1_ENABLED: ${{ inputs.linux_6_1_enabled }}
           MATRIX_LINUX_NIGHTLY_NEXT_ENABLED: ${{ inputs.linux_nightly_6_1_enabled && inputs.linux_nightly_next_enabled }}
           MATRIX_LINUX_NIGHTLY_MAIN_ENABLED: ${{ inputs.linux_nightly_main_enabled }}
 
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7f883d7d923..c1ff2e39239 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,6 +15,7 @@ jobs:
       linux_5_9_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_5_10_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_6_0_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
+      linux_6_1_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_nightly_6_1_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_nightly_main_arguments_override: "--explicit-target-dependency-import-check error"
 
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 936c8084b37..7d8ff92dc67 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -19,6 +19,7 @@ jobs:
       linux_5_9_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_5_10_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_6_0_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
+      linux_6_1_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_nightly_6_1_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
       linux_nightly_main_arguments_override: "--explicit-target-dependency-import-check error"
 
diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 656859824a0..8b153fd3f5f 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -27,6 +27,14 @@ on:
         type: string
         description: "The arguments passed to swift test in the Linux 6.0 Swift version matrix job."
         default: ""
+      linux_6_1_enabled:
+        type: boolean
+        description: "Boolean to enable the Linux 6.1 Swift version matrix job. Defaults to true."
+        default: true
+      linux_6_1_arguments_override:
+        type: string
+        description: "The arguments passed to swift test in the Linux 6.1 Swift version matrix job."
+        default: ""
       linux_nightly_6_0_enabled:
         type: boolean
         description: "⚠️  Deprecated, we no longer run against 6.0 nightly."
@@ -68,6 +76,14 @@ on:
         type: string
         description: "The arguments passed to swift test in the Windows 6.0 Swift version matrix job."
         default: ""
+      windows_6_1_enabled:
+        type: boolean
+        description: "Boolean to enable the Windows 6.1 Swift version matrix job. Defaults to false."
+        default: false
+      windows_6_1_arguments_override:
+        type: string
+        description: "The arguments passed to swift test in the Windows 6.1 Swift version matrix job."
+        default: ""
       windows_nightly_6_0_enabled:
         type: boolean
         description: "⚠️  Deprecated, we no longer run against 6.0 nightly."
@@ -122,6 +138,8 @@ jobs:
           MATRIX_LINUX_5_10_COMMAND_ARGUMENTS: ${{ inputs.linux_5_10_arguments_override }}
           MATRIX_LINUX_6_0_ENABLED: ${{ inputs.linux_6_0_enabled }}
           MATRIX_LINUX_6_0_COMMAND_ARGUMENTS: ${{ inputs.linux_6_0_arguments_override }}
+          MATRIX_LINUX_6_1_ENABLED: ${{ inputs.linux_6_1_enabled }}
+          MATRIX_LINUX_6_1_COMMAND_ARGUMENTS: ${{ inputs.linux_6_1_arguments_override }}
           MATRIX_LINUX_NIGHTLY_NEXT_ENABLED: ${{ inputs.linux_nightly_6_1_enabled && inputs.linux_nightly_next_enabled }}
           MATRIX_LINUX_NIGHTLY_NEXT_COMMAND_ARGUMENTS: ${{ inputs.linux_nightly_6_1_arguments_override }} ${{ inputs.linux_nightly_next_arguments_override }}
           MATRIX_LINUX_NIGHTLY_MAIN_ENABLED: ${{ inputs.linux_nightly_main_enabled }}
@@ -129,6 +147,8 @@ jobs:
           MATRIX_WINDOWS_COMMAND: "swift test"
           MATRIX_WINDOWS_6_0_ENABLED: ${{ inputs.windows_6_0_enabled }}
           MATRIX_WINDOWS_6_0_COMMAND_ARGUMENTS: ${{ inputs.windows_6_0_arguments_override }}
+          MATRIX_WINDOWS_6_1_ENABLED: ${{ inputs.windows_6_1_enabled }}
+          MATRIX_WINDOWS_6_1_COMMAND_ARGUMENTS: ${{ inputs.windows_6_1_arguments_override }}
           MATRIX_WINDOWS_NIGHTLY_NEXT_ENABLED: ${{ inputs.windows_nightly_6_1_enabled && inputs.windows_nightly_next_enabled }}
           MATRIX_WINDOWS_NIGHTLY_NEXT_COMMAND_ARGUMENTS: ${{ inputs.windows_nightly_6_1_arguments_override }} ${{ inputs.windows_nightly_next_arguments_override }}
           MATRIX_WINDOWS_NIGHTLY_MAIN_ENABLED: ${{ inputs.windows_nightly_main_enabled }}
diff --git a/Benchmarks/Thresholds/6.1/NIOCoreBenchmarks.NIOAsyncChannel.init.p90.json b/Benchmarks/Thresholds/6.1/NIOCoreBenchmarks.NIOAsyncChannel.init.p90.json
new file mode 100644
index 00000000000..ec2d0ad0f87
--- /dev/null
+++ b/Benchmarks/Thresholds/6.1/NIOCoreBenchmarks.NIOAsyncChannel.init.p90.json
@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 8000
+}
\ No newline at end of file
diff --git a/Benchmarks/Thresholds/6.1/NIOPosixBenchmarks.TCPEcho.p90.json b/Benchmarks/Thresholds/6.1/NIOPosixBenchmarks.TCPEcho.p90.json
new file mode 100644
index 00000000000..c6a93680d0a
--- /dev/null
+++ b/Benchmarks/Thresholds/6.1/NIOPosixBenchmarks.TCPEcho.p90.json
@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 108
+}
diff --git a/Benchmarks/Thresholds/6.1/NIOPosixBenchmarks.TCPEchoAsyncChannel.p90.json b/Benchmarks/Thresholds/6.1/NIOPosixBenchmarks.TCPEchoAsyncChannel.p90.json
new file mode 100644
index 00000000000..390ed2415a7
--- /dev/null
+++ b/Benchmarks/Thresholds/6.1/NIOPosixBenchmarks.TCPEchoAsyncChannel.p90.json
@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 164376
+}
\ No newline at end of file
diff --git a/IntegrationTests/tests_04_performance/Thresholds/6.1.json b/IntegrationTests/tests_04_performance/Thresholds/6.1.json
new file mode 100644
index 00000000000..0870e33436e
--- /dev/null
+++ b/IntegrationTests/tests_04_performance/Thresholds/6.1.json
@@ -0,0 +1,59 @@
+{
+    "10000000_asyncsequenceproducer": 19,
+    "1000000_asyncwriter": 1000050,
+    "1000_addHandlers": 44050,
+    "1000_addHandlers_sync": 37050,
+    "1000_addRemoveHandlers_handlercontext": 8050,
+    "1000_addRemoveHandlers_handlername": 8050,
+    "1000_addRemoveHandlers_handlertype": 8050,
+    "1000_autoReadGetAndSet": 18050,
+    "1000_autoReadGetAndSet_sync": 0,
+    "1000_copying_bytebufferview_to_array": 1050,
+    "1000_copying_circularbuffer_to_array": 1050,
+    "1000_getHandlers": 8050,
+    "1000_getHandlers_sync": 35,
+    "1000_reqs_1_conn": 26400,
+    "1000_rst_connections": 145050,
+    "1000_tcpbootstraps": 3050,
+    "1000_tcpconnections": 152050,
+    "1000_udp_reqs": 6050,
+    "1000_udpbootstraps": 2050,
+    "1000_udpconnections": 75050,
+    "1_reqs_1000_conn": 384000,
+    "assume_isolated_scheduling_10000_executions": 89,
+    "bytebuffer_lots_of_rw": 2050,
+    "creating_10000_headers": 0,
+    "decode_1000_ws_frames": 2050,
+    "encode_1000_ws_frames_holding_buffer": 3,
+    "encode_1000_ws_frames_holding_buffer_with_mask": 2050,
+    "encode_1000_ws_frames_holding_buffer_with_space": 3,
+    "encode_1000_ws_frames_holding_buffer_with_space_with_mask": 2050,
+    "encode_1000_ws_frames_new_buffer": 3050,
+    "encode_1000_ws_frames_new_buffer_with_mask": 5050,
+    "encode_1000_ws_frames_new_buffer_with_space": 3050,
+    "encode_1000_ws_frames_new_buffer_with_space_with_mask": 5050,
+    "execute_hop_10000_tasks": 0,
+    "flat_schedule_10000_tasks": 100100,
+    "flat_schedule_assume_isolated_10000_tasks": 90100,
+    "future_assume_isolated_lots_of_callbacks": 74050,
+    "future_erase_result": 4050,
+    "future_lots_of_callbacks": 74050,
+    "get_100000_headers_canonical_form": 700050,
+    "get_100000_headers_canonical_form_trimming_whitespace": 700050,
+    "get_100000_headers_canonical_form_trimming_whitespace_from_long_string": 700050,
+    "get_100000_headers_canonical_form_trimming_whitespace_from_short_string": 700050,
+    "modifying_1000_circular_buffer_elements": 0,
+    "modifying_byte_buffer_view": 6050,
+    "ping_pong_1000_reqs_1_conn": 314,
+    "read_10000_chunks_from_file": 110050,
+    "schedule_10000_tasks": 40100,
+    "schedule_and_run_10000_tasks": 50050,
+    "schedule_assume_isolated_10000_tasks": 40100,
+    "schedule_with_deadline_10000_tasks": 40100,
+    "schedule_with_deadline_assume_isolated_10000_tasks": 40100,
+    "scheduling_10000_executions": 89,
+    "submit_10000_tasks": 20100,
+    "submit_assume_isolated_10000_tasks": 20100,
+    "udp_1000_reqs_1_conn": 6200,
+    "udp_1_reqs_1000_conn": 162050
+}
diff --git a/scripts/generate_matrix.sh b/scripts/generate_matrix.sh
index 02490ba222b..6d94b6e88b0 100755
--- a/scripts/generate_matrix.sh
+++ b/scripts/generate_matrix.sh
@@ -21,7 +21,9 @@ linux_5_9_command_arguments="$MATRIX_LINUX_5_9_COMMAND_ARGUMENTS"
 linux_5_10_enabled="${MATRIX_LINUX_5_10_ENABLED:=true}"
 linux_5_10_command_arguments="$MATRIX_LINUX_5_10_COMMAND_ARGUMENTS"
 linux_6_0_enabled="${MATRIX_LINUX_6_0_ENABLED:=true}"
+linux_6_1_enabled="${MATRIX_LINUX_6_1_ENABLED:=true}"
 linux_6_0_command_arguments="$MATRIX_LINUX_6_0_COMMAND_ARGUMENTS"
+linux_6_1_command_arguments="$MATRIX_LINUX_6_1_COMMAND_ARGUMENTS"
 linux_nightly_next_enabled="${MATRIX_LINUX_NIGHTLY_NEXT_ENABLED:=${MATRIX_LINUX_NIGHTLY_6_1_ENABLED:=true}}"
 linux_nightly_next_command_arguments="${MATRIX_LINUX_NIGHTLY_NEXT_COMMAND_ARGUMENTS:=${MATRIX_LINUX_NIGHTLY_6_1_COMMAND_ARGUMENTS}}"
 linux_nightly_main_enabled="${MATRIX_LINUX_NIGHTLY_MAIN_ENABLED:=true}"
@@ -30,7 +32,9 @@ linux_nightly_main_command_arguments="$MATRIX_LINUX_NIGHTLY_MAIN_COMMAND_ARGUMEN
 windows_command="$MATRIX_WINDOWS_COMMAND"  # required if any Windows pipeline is enabled
 windows_setup_command="$MATRIX_WINDOWS_SETUP_COMMAND"
 windows_6_0_enabled="${MATRIX_WINDOWS_6_0_ENABLED:=false}"
+windows_6_1_enabled="${MATRIX_WINDOWS_6_1_ENABLED:=false}"
 windows_6_0_command_arguments="$MATRIX_WINDOWS_6_0_COMMAND_ARGUMENTS"
+windows_6_1_command_arguments="$MATRIX_WINDOWS_6_1_COMMAND_ARGUMENTS"
 windows_nightly_next_enabled="${MATRIX_WINDOWS_NIGHTLY_NEXT_ENABLED:=${MATRIX_WINDOWS_NIGHTLY_6_1_ENABLED:=false}}"
 windows_nightly_next_command_arguments="${MATRIX_WINDOWS_NIGHTLY_NEXT_COMMAND_ARGUMENTS:=${MATRIX_WINDOWS_NIGHTLY_6_1_COMMAND_ARGUMENTS}}"
 windows_nightly_main_enabled="${MATRIX_WINDOWS_NIGHTLY_MAIN_ENABLED:=false}"
@@ -41,11 +45,14 @@ linux_runner="ubuntu-latest"
 linux_5_9_container_image="swift:5.9-jammy"
 linux_5_10_container_image="swift:5.10-jammy"
 linux_6_0_container_image="swift:6.0-jammy"
+linux_6_1_container_image="swift:6.1-jammy"
 linux_nightly_next_container_image="swiftlang/swift:nightly-6.1-jammy"
 linux_nightly_main_container_image="swiftlang/swift:nightly-main-jammy"
 
 windows_6_0_runner="windows-2022"
 windows_6_0_container_image="swift:6.0-windowsservercore-ltsc2022"
+windows_6_1_runner="windows-2022"
+windows_6_1_container_image="swift:6.1-windowsservercore-ltsc2022"
 windows_nightly_next_runner="windows-2019"
 windows_nightly_next_container_image="swiftlang/swift:nightly-6.1-windowsservercore-1809"
 windows_nightly_main_runner="windows-2019"
@@ -55,8 +62,14 @@ windows_nightly_main_container_image="swiftlang/swift:nightly-main-windowsserver
 matrix='{"config": []}'
 
 ## Linux
-if [[ "$linux_5_9_enabled" == "true" || "$linux_5_10_enabled" == "true" || "$linux_6_0_enabled" == "true" || \
-  "$linux_nightly_next_enabled" == "true" || "$linux_nightly_main_enabled" == "true" ]]; then
+if [[ \
+  "$linux_5_9_enabled" == "true" || \
+  "$linux_5_10_enabled" == "true" || \
+  "$linux_6_0_enabled" == "true" || \
+  "$linux_6_1_enabled" == "true" || \
+  "$linux_nightly_next_enabled" == "true" || \
+  "$linux_nightly_main_enabled" == "true" \
+]]; then
   if [[ -z "$linux_command" ]]; then
     echo "No linux command defined"; exit 1
   fi
@@ -93,6 +106,16 @@ if [[ "$linux_6_0_enabled" == "true" ]]; then
     '.config[.config| length] |= . + { "name": "6.0", "image": $container_image, "swift_version": "6.0", "platform": "Linux", "command": $command, "command_arguments": $command_arguments, "setup_command": $setup_command, "runner": $runner}')
 fi
 
+if [[ "$linux_6_1_enabled" == "true" ]]; then
+  matrix=$(echo "$matrix" | jq -c \
+    --arg setup_command "$linux_setup_command"  \
+    --arg command "$linux_command"  \
+    --arg command_arguments "$linux_6_1_command_arguments" \
+    --arg container_image "$linux_6_1_container_image" \
+    --arg runner "$linux_runner" \
+    '.config[.config| length] |= . + { "name": "6.1", "image": $container_image, "swift_version": "6.1", "platform": "Linux", "command": $command, "command_arguments": $command_arguments, "setup_command": $setup_command, "runner": $runner}')
+fi
+
 if [[ "$linux_nightly_next_enabled" == "true" ]]; then
   matrix=$(echo "$matrix" | jq -c \
     --arg setup_command "$linux_setup_command"  \
@@ -114,7 +137,11 @@ if [[ "$linux_nightly_main_enabled" == "true" ]]; then
 fi
 
 ## Windows
-if [[ "$windows_6_0_enabled" == "true" || "$windows_nightly_next_enabled" == "true" || "$windows_nightly_main_enabled" == "true" ]]; then
+if [[ \
+  "$windows_6_0_enabled" == "true" || \
+  "$windows_nightly_next_enabled" == "true" || \
+  "$windows_nightly_main_enabled" == "true" \
+]]; then
   if [[ -z "$windows_command" ]]; then
     echo "No windows command defined"; exit 1
   fi
@@ -130,6 +157,16 @@ if [[ "$windows_6_0_enabled" == "true" ]]; then
     '.config[.config| length] |= . + { "name": "6.0", "image": $container_image, "swift_version": "6.0", "platform": "Windows", "command": $command, "command_arguments": $command_arguments, "setup_command": $setup_command, "runner": $runner }')
 fi
 
+if [[ "$windows_6_1_enabled" == "true" ]]; then
+  matrix=$(echo "$matrix" | jq -c \
+    --arg setup_command "$windows_setup_command"  \
+    --arg command "$windows_command"  \
+    --arg command_arguments "$windows_6_1_command_arguments" \
+    --arg container_image "$windows_6_1_container_image" \
+    --arg runner "$windows_6_1_runner" \
+    '.config[.config| length] |= . + { "name": "6.1", "image": $container_image, "swift_version": "6.1", "platform": "Windows", "command": $command, "command_arguments": $command_arguments, "setup_command": $setup_command, "runner": $runner }')
+fi
+
 if [[ "$windows_nightly_next_enabled" == "true" ]]; then
   matrix=$(echo "$matrix" | jq -c \
     --arg setup_command "$windows_setup_command"  \