diff --git a/.buildkite/pipelines/build_linux.json.py b/.buildkite/pipelines/build_linux.json.py
index 56c6002aa..e1714d011 100755
--- a/.buildkite/pipelines/build_linux.json.py
+++ b/.buildkite/pipelines/build_linux.json.py
@@ -36,7 +36,7 @@
       "cpu": "6",
       "ephemeralStorage": "20G",
       "memory": "64G",
-      "image": os.getenv("DOCKER_IMAGE", "docker.elastic.co/ml-dev/ml-linux-build:33")
+      "image": os.getenv("DOCKER_IMAGE", "docker.elastic.co/ml-dev/ml-linux-build:34")
    },
    "aarch64": {
       "provider": "aws",
@@ -101,7 +101,7 @@ def main(args):
               "cpu": "6",
               "ephemeralStorage": "20G",
               "memory": "64G",
-              "image": "docker.elastic.co/ml-dev/ml-linux-aarch64-cross-build:16"
+              "image": "docker.elastic.co/ml-dev/ml-linux-aarch64-cross-build:17"
             },
             "commands": [
               ".buildkite/scripts/steps/build_and_test.sh"
diff --git a/.buildkite/pipelines/build_macos.json.py b/.buildkite/pipelines/build_macos.json.py
index 681da7e13..4b72b6964 100755
--- a/.buildkite/pipelines/build_macos.json.py
+++ b/.buildkite/pipelines/build_macos.json.py
@@ -33,7 +33,7 @@
 agents = {
    "aarch64": {
       "provider": "orka",
-      "image": "ml-macos-13-arm-004.orkasi"
+      "image": "ml-macos-13-arm-005.orkasi"
    }
 }
 envs = {
diff --git a/.buildkite/pipelines/build_windows.json.py b/.buildkite/pipelines/build_windows.json.py
index b357944f8..4872adcd2 100755
--- a/.buildkite/pipelines/build_windows.json.py
+++ b/.buildkite/pipelines/build_windows.json.py
@@ -45,7 +45,7 @@ def main(args):
               "provider": "gcp",
               "machineType": "c2-standard-16",
               "minCpuPlatform": "Intel Cascade Lake",
-              "image": "family/ml-cpp-4-windows-2022",
+              "image": "family/ml-cpp-5-windows-2022",
             },
             "commands": [
               f'if ( "{args.action}" -eq "debug" ) {{\$Env:ML_DEBUG="1"}}',
diff --git a/.ci/orka/README.md b/.ci/orka/README.md
index a85520183..6b9d39c36 100644
--- a/.ci/orka/README.md
+++ b/.ci/orka/README.md
@@ -9,7 +9,7 @@
 ## Files
 
 - `install.sh` The script that does the software installs on the image
-- `orka-macos-12-arm.pkr.hcl` The packer definition for a MacOS 12 ARM builder image
+- `orka-macos-13-arm.pkr.hcl` The packer definition for a MacOS 13 ARM builder image
 
 
 ## Set Up Packer
@@ -26,7 +26,7 @@ Make sure you are connected to the Orka VM.
 
 Packer requires access to secrets in vault, where VAULT_ADDR=https://vault-ci-prod.elastic.dev and VAULT_TOKEN must be set appropriately in the environment.
 
-Run the following to create the image (MacOS 12 ARM in this example):
+Run the following to create the image (MacOS 13 ARM in this example):
 
 ```
 packer build orka-macos-13-arm.pkr.hcl
@@ -63,7 +63,7 @@ The ML packer scripts do the following:
  * Install JDK `11.0.25`
  * Install CMake `3.30.5`
  * Install Boost `1.86.0` from source
- * Install PyTorch `2.5.1` from source
+ * Install PyTorch `2.7.1` from source
 
 ## Caveats
 
diff --git a/.ci/orka/orka-macos-13-arm.pkr.hcl b/.ci/orka/orka-macos-13-arm.pkr.hcl
index bfe9dc96b..5ec0880f1 100644
--- a/.ci/orka/orka-macos-13-arm.pkr.hcl
+++ b/.ci/orka/orka-macos-13-arm.pkr.hcl
@@ -18,7 +18,7 @@ locals {
 
 source "macstadium-orka" "image" {
   source_image     = "generic-13-ventura-arm-002.orkasi"
-  image_name       = "ml-macos-13-arm-004.orkasi"
+  image_name       = "ml-macos-13-arm-005.orkasi"
   orka_endpoint    = local.orka_endpoint
   orka_user        = local.orka_user
   orka_password    = local.orka_password
diff --git a/.ci/orka/third_party_deps.sh b/.ci/orka/third_party_deps.sh
index 585edc511..b48bef31a 100644
--- a/.ci/orka/third_party_deps.sh
+++ b/.ci/orka/third_party_deps.sh
@@ -34,7 +34,7 @@ sudo rm -rf boost_1_86_0
 sudo pip3 install numpy ninja pyyaml setuptools cffi typing_extensions future six requests dataclasses
 
 # Build and install PyTorch
-git clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git && \
+git clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git && \
 cd pytorch && \
 git submodule sync && \
 git submodule update --init --recursive && \
@@ -59,7 +59,7 @@ export DNNL_TARGET_ARCH=AARCH64
 export USE_MKLDNN=ON
 export USE_QNNPACK=OFF
 export USE_PYTORCH_QNNPACK=OFF
-export PYTORCH_BUILD_VERSION=2.5.1
+export PYTORCH_BUILD_VERSION=2.7.1
 export PYTORCH_BUILD_NUMBER=1
 python3 setup.py install
 
diff --git a/3rd_party/licenses/pytorch-INFO.csv b/3rd_party/licenses/pytorch-INFO.csv
index 6750bd122..04bd473a0 100644
--- a/3rd_party/licenses/pytorch-INFO.csv
+++ b/3rd_party/licenses/pytorch-INFO.csv
@@ -1,2 +1,2 @@
 name,version,revision,url,license,copyright,sourceURL
-PyTorch,2.5.1,a8d6afb511a69687bbb2b7e88a3cf67917e1697e,https://pytorch.org,BSD-3-Clause,,
+PyTorch,2.7.1,e2d141dbde55c2a4370fac5165b0561b6af4798b,https://pytorch.org,BSD-3-Clause,,
diff --git a/build-setup/linux.md b/build-setup/linux.md
index 0621c2121..0fc99dffa 100644
--- a/build-setup/linux.md
+++ b/build-setup/linux.md
@@ -333,7 +333,7 @@ Then copy the shared libraries to the system directory:
 (cd /opt/intel/oneapi/mkl/2024.0 && tar cf - lib) | (cd /usr/local/gcc133 && sudo tar xvf -)
 ```
 
-### PyTorch 2.5.1
+### PyTorch 2.7.1
 
 (This step requires a reasonable amount of memory. It failed on a machine with 8GB of RAM. It succeeded on a 16GB machine. You can specify the number of parallel jobs using environment variable MAX_JOBS. Lower number of jobs will reduce memory usage.)
 
@@ -352,7 +352,7 @@ sudo /usr/local/gcc133/bin/python3.12 -m pip install numpy pyyaml setuptools cff
 Then obtain the PyTorch code:
 
 ```
-git clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git
+git clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git
 cd pytorch
 git submodule sync
 git submodule update --init --recursive
@@ -386,7 +386,7 @@ export USE_MKLDNN=ON
 export USE_QNNPACK=OFF
 export USE_PYTORCH_QNNPACK=OFF
 [ $(uname -m) = x86_64 ] && export USE_XNNPACK=OFF
-export PYTORCH_BUILD_VERSION=2.5.1
+export PYTORCH_BUILD_VERSION=2.7.1
 export PYTORCH_BUILD_NUMBER=1
 /usr/local/gcc133/bin/python3.12 setup.py install
 ```
diff --git a/build-setup/macos.md b/build-setup/macos.md
index 2ca1765ac..f34257ef6 100644
--- a/build-setup/macos.md
+++ b/build-setup/macos.md
@@ -133,18 +133,18 @@ Download the graphical installer for Python 3.10.10 from <https://www.python.org
 
 Install using all the default options.  When the installer completes a Finder window pops up.  Double click the `Install Certificates.command` file in this folder to install the SSL certificates Python needs.
 
-### PyTorch 2.5.1
+### PyTorch 2.7.1
 
 PyTorch requires that certain Python modules are installed.  To install them:
 
 ```
-sudo /Library/Frameworks/Python.framework/Versions/3.10/bin/pip3.10 install numpy ninja pyyaml setuptools cffi typing_extensions future six requests dataclasses
+sudo /Library/Frameworks/Python.framework/Versions/3.12/bin/pip3.12 install numpy ninja pyyaml setuptools cffi typing_extensions future six requests dataclasses
 ```
 
 Then obtain the PyTorch code:
 
 ```
-git clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git
+git clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git
 cd pytorch
 git submodule sync
 git submodule update --init --recursive
@@ -188,9 +188,9 @@ export DNNL_TARGET_ARCH=AARCH64
 export USE_MKLDNN=ON
 export USE_QNNPACK=OFF
 export USE_PYTORCH_QNNPACK=OFF
-export PYTORCH_BUILD_VERSION=2.5.1
+export PYTORCH_BUILD_VERSION=2.7.1
 export PYTORCH_BUILD_NUMBER=1
-/Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10 setup.py install
+/Library/Frameworks/Python.framework/Versions/3.12/bin/python3.12 setup.py install
 ```
 
 Once built copy headers and libraries to system directories:
diff --git a/build-setup/windows.md b/build-setup/windows.md
index ad74470a0..2f84c0f43 100644
--- a/build-setup/windows.md
+++ b/build-setup/windows.md
@@ -202,7 +202,7 @@ On the "Advanced Options" screen, check "Install for all users" and "Add Python
 
 For the time being, do not take advantage of the option on the final installer screen to reconfigure the machine to allow paths longer than 260 characters.  We still support Windows versions that do not have this option.
 
-### PyTorch 2.5.1
+### PyTorch 2.7.1
 
 (This step requires a lot of memory. It failed on a machine with 12GB of RAM. It just about fitted on a 20GB machine. 32GB RAM is recommended.)
 
@@ -216,7 +216,7 @@ Next, in a Git bash shell run:
 
 ```
 cd /c/tools
-git clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git
+git clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git
 cd pytorch
 git submodule sync
 git submodule update --init --recursive
@@ -272,7 +272,7 @@ set USE_QNNPACK=OFF
 set USE_PYTORCH_QNNPACK=OFF
 set USE_XNNPACK=OFF
 set MSVC_Z7_OVERRIDE=OFF
-set PYTORCH_BUILD_VERSION=2.5.1
+set PYTORCH_BUILD_VERSION=2.7.1
 set PYTORCH_BUILD_NUMBER=1
 python setup.py install
 ```
diff --git a/dev-tools/build_windows_third_party_deps.ps1 b/dev-tools/build_windows_third_party_deps.ps1
index afc4509c6..7b69b5c85 100644
--- a/dev-tools/build_windows_third_party_deps.ps1
+++ b/dev-tools/build_windows_third_party_deps.ps1
@@ -68,7 +68,7 @@ Write-Host "--- Done Installing libxml2 2.9.14"
 Write-Host "--- Installing boost 1.86.0"
 cd c:\tools
 $Archive="boost_1_86_0.tar.bz2"
-$ZipSource="https://archives.boost.io/main/release/1.86.0/source/$Archive"
+$ZipSource="https://archives.boost.io/release/1.86.0/source/$Archive"
 $ZipDestination="\tools\$Archive"
 (New-Object Net.WebClient).DownloadFile($ZipSource, $ZipDestination)
 C:\Progra~1\git\bin\bash.exe -c "tar jxvf boost_1_86_0.tar.bz2"
@@ -117,7 +117,7 @@ mv "C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\Tools\MSVC\$f\
 # Build and install PyTorch (this may take a while)
 Write-Host "--- Installing PyTorch locally"
 cd c:\tools
-git clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git
+git clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git
 cd pytorch
 git submodule sync
 git submodule update --init --recursive
@@ -131,7 +131,7 @@ set USE_QNNPACK=OFF
 set USE_PYTORCH_QNNPACK=OFF
 set USE_XNNPACK=OFF
 set MSVC_Z7_OVERRIDE=OFF
-set PYTORCH_BUILD_VERSION=2.5.1
+set PYTORCH_BUILD_VERSION=2.7.1
 set PYTORCH_BUILD_NUMBER=1
 python setup.py install
 Write-Host "--- Done Installing PyTorch locally"
diff --git a/dev-tools/docker/build_linux_aarch64_cross_build_image.sh b/dev-tools/docker/build_linux_aarch64_cross_build_image.sh
index acc5e77b7..cadcc4997 100755
--- a/dev-tools/docker/build_linux_aarch64_cross_build_image.sh
+++ b/dev-tools/docker/build_linux_aarch64_cross_build_image.sh
@@ -22,7 +22,7 @@
 HOST=docker.elastic.co
 ACCOUNT=ml-dev
 REPOSITORY=ml-linux-aarch64-cross-build
-VERSION=14
+VERSION=17
 
 set -e
 
diff --git a/dev-tools/docker/build_linux_aarch64_native_build_image.sh b/dev-tools/docker/build_linux_aarch64_native_build_image.sh
index 217283e56..3e5e14d33 100755
--- a/dev-tools/docker/build_linux_aarch64_native_build_image.sh
+++ b/dev-tools/docker/build_linux_aarch64_native_build_image.sh
@@ -34,7 +34,7 @@ sleep 5
 HOST=docker.elastic.co
 ACCOUNT=ml-dev
 REPOSITORY=ml-linux-aarch64-native-build
-VERSION=14
+VERSION=17
 
 set -e
 
diff --git a/dev-tools/docker/build_linux_build_image.sh b/dev-tools/docker/build_linux_build_image.sh
index ba1b4176b..72102fedd 100755
--- a/dev-tools/docker/build_linux_build_image.sh
+++ b/dev-tools/docker/build_linux_build_image.sh
@@ -34,7 +34,7 @@ sleep 5
 HOST=docker.elastic.co
 ACCOUNT=ml-dev
 REPOSITORY=ml-linux-build
-VERSION=31
+VERSION=34
 
 set -e
 
diff --git a/dev-tools/docker/linux_aarch64_cross_builder/Dockerfile b/dev-tools/docker/linux_aarch64_cross_builder/Dockerfile
index b8b11f570..82e0224dd 100644
--- a/dev-tools/docker/linux_aarch64_cross_builder/Dockerfile
+++ b/dev-tools/docker/linux_aarch64_cross_builder/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-aarch64-cross-build:16
+FROM docker.elastic.co/ml-dev/ml-linux-aarch64-cross-build:17
 
 MAINTAINER David Roberts <dave.roberts@elastic.co>
 
diff --git a/dev-tools/docker/linux_aarch64_cross_image/Dockerfile b/dev-tools/docker/linux_aarch64_cross_image/Dockerfile
index f485deca2..004892a09 100644
--- a/dev-tools/docker/linux_aarch64_cross_image/Dockerfile
+++ b/dev-tools/docker/linux_aarch64_cross_image/Dockerfile
@@ -27,7 +27,7 @@ RUN dnf -y update && \
 RUN \
   mkdir -p /usr/local/sysroot-aarch64-linux-gnu/usr && \
   cd /usr/local/sysroot-aarch64-linux-gnu/usr && \
-  wget --quiet -O - https://s3-eu-west-2.amazonaws.com/ml-cpp-artifacts/dependencies/usr-aarch64-linux-gnu-16.tar.bz2 | tar jxf - && \
+  wget --quiet -O - https://s3-eu-west-2.amazonaws.com/ml-cpp-artifacts/dependencies/usr-aarch64-linux-gnu-17.tar.bz2 | tar jxf - && \
   cd .. && \
   ln -s usr/lib lib && \
   ln -s usr/lib64 lib64
diff --git a/dev-tools/docker/linux_aarch64_native_builder/Dockerfile b/dev-tools/docker/linux_aarch64_native_builder/Dockerfile
index e4d03181d..1524b0045 100644
--- a/dev-tools/docker/linux_aarch64_native_builder/Dockerfile
+++ b/dev-tools/docker/linux_aarch64_native_builder/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-aarch64-native-build:16
+FROM docker.elastic.co/ml-dev/ml-linux-aarch64-native-build:17
 
 MAINTAINER David Roberts <dave.roberts@elastic.co>
 
diff --git a/dev-tools/docker/linux_aarch64_native_image/Dockerfile b/dev-tools/docker/linux_aarch64_native_image/Dockerfile
index f3cb5d19c..7e8bd99c0 100644
--- a/dev-tools/docker/linux_aarch64_native_image/Dockerfile
+++ b/dev-tools/docker/linux_aarch64_native_image/Dockerfile
@@ -169,7 +169,7 @@ RUN \
 # If the PyTorch branch is changed also update PYTORCH_BUILD_VERSION
 RUN \
   cd ${build_dir} && \
-  git -c advice.detachedHead=false clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git && \
+  git -c advice.detachedHead=false clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git && \
   cd pytorch && \
   git submodule sync && \
   git submodule update --init --recursive && \
@@ -183,7 +183,7 @@ RUN \
   export USE_MKLDNN=ON && \
   export USE_QNNPACK=OFF && \
   export USE_PYTORCH_QNNPACK=OFF && \
-  export PYTORCH_BUILD_VERSION=2.5.1 && \
+  export PYTORCH_BUILD_VERSION=2.7.1 && \
   export PYTORCH_BUILD_NUMBER=1 && \
   export MAX_JOBS=10 && \
   /usr/local/bin/python3.12 setup.py install && \
diff --git a/dev-tools/docker/linux_aarch64_native_tester/Dockerfile b/dev-tools/docker/linux_aarch64_native_tester/Dockerfile
index aa3c6c33c..008376518 100644
--- a/dev-tools/docker/linux_aarch64_native_tester/Dockerfile
+++ b/dev-tools/docker/linux_aarch64_native_tester/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-aarch64-native-build:16
+FROM docker.elastic.co/ml-dev/ml-linux-aarch64-native-build:17
 
 MAINTAINER David Roberts <dave.roberts@elastic.co>
 
diff --git a/dev-tools/docker/linux_builder/Dockerfile b/dev-tools/docker/linux_builder/Dockerfile
index 587229e07..ad5ab9483 100644
--- a/dev-tools/docker/linux_builder/Dockerfile
+++ b/dev-tools/docker/linux_builder/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-build:33
+FROM docker.elastic.co/ml-dev/ml-linux-build:34
 
 LABEL maintainer="Valeriy Khakhutskyy <valeriy.khakhutskyy@elastic.co>"
 
diff --git a/dev-tools/docker/linux_dependency_builder_image/Dockerfile b/dev-tools/docker/linux_dependency_builder_image/Dockerfile
index bab0880c0..1f172c33b 100644
--- a/dev-tools/docker/linux_dependency_builder_image/Dockerfile
+++ b/dev-tools/docker/linux_dependency_builder_image/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-build:33 AS builder
+FROM docker.elastic.co/ml-dev/ml-linux-build:34 AS builder
 
 # This is basically automating the setup instructions in build-setup/linux.md
 
diff --git a/dev-tools/docker/linux_image/Dockerfile b/dev-tools/docker/linux_image/Dockerfile
index 34426f99e..7099e1a6d 100644
--- a/dev-tools/docker/linux_image/Dockerfile
+++ b/dev-tools/docker/linux_image/Dockerfile
@@ -183,7 +183,7 @@ gpgkey=https://yum.repos.intel.com/intel-gpg-keys/GPG-PUB-KEY-INTEL-SW-PRODUCTS.
 # If the PyTorch branch is changed also update PYTORCH_BUILD_VERSION
 RUN \
   cd ${build_dir} && \
-  git -c advice.detachedHead=false clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git && \
+  git -c advice.detachedHead=false clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git && \
   cd pytorch && \
   git submodule sync && \
   git submodule update --init --recursive && \
@@ -198,7 +198,7 @@ RUN \
   export USE_QNNPACK=OFF && \
   export USE_PYTORCH_QNNPACK=OFF && \
   export USE_XNNPACK=OFF && \
-  export PYTORCH_BUILD_VERSION=2.5.1 && \
+  export PYTORCH_BUILD_VERSION=2.7.1 && \
   export PYTORCH_BUILD_NUMBER=1 && \
   export MAX_JOBS=10 && \
   /usr/local/bin/python3.12 setup.py install && \
diff --git a/dev-tools/docker/linux_tester/Dockerfile b/dev-tools/docker/linux_tester/Dockerfile
index 058709cae..7e3ef0ba5 100644
--- a/dev-tools/docker/linux_tester/Dockerfile
+++ b/dev-tools/docker/linux_tester/Dockerfile
@@ -10,7 +10,7 @@
 #
 
 # Increment the version here when a new tools/3rd party components image is built
-FROM docker.elastic.co/ml-dev/ml-linux-build:33
+FROM docker.elastic.co/ml-dev/ml-linux-build:34
 
 LABEL maintainer="Valeriy Khakhutskyy <valeriy.khakhutskyy@elastic.co>"
 
diff --git a/dev-tools/docker/ubuntu_devbox/Dockerfile b/dev-tools/docker/ubuntu_devbox/Dockerfile
index 4da7076a9..0d5a7becb 100644
--- a/dev-tools/docker/ubuntu_devbox/Dockerfile
+++ b/dev-tools/docker/ubuntu_devbox/Dockerfile
@@ -165,7 +165,7 @@ ENV PATH=/usr/local/gcc133/bin:/usr/bin:/bin:/usr/sbin:/sbin
 # If the PyTorch branch is changed also update PYTORCH_BUILD_VERSION
 RUN \
   cd ${build_dir} && \
-  git -c advice.detachedHead=false clone --depth=1 --branch=v2.5.1 https://github.com/pytorch/pytorch.git && \
+  git -c advice.detachedHead=false clone --depth=1 --branch=v2.7.1 https://github.com/pytorch/pytorch.git && \
   cd pytorch && \
   git submodule sync && \
   git submodule update --init --recursive && \
@@ -179,7 +179,7 @@ RUN \
   export USE_QNNPACK=OFF && \
   export USE_PYTORCH_QNNPACK=OFF && \
   export USE_XNNPACK=OFF && \
-  export PYTORCH_BUILD_VERSION=2.5.1 && \
+  export PYTORCH_BUILD_VERSION=2.7.1 && \
   export PYTORCH_BUILD_NUMBER=1 && \
   export MAX_JOBS=10 && \
   /usr/local/bin/python3.12 setup.py install
diff --git a/dev-tools/docker_build.sh b/dev-tools/docker_build.sh
index fc1eac34a..5edc131f6 100755
--- a/dev-tools/docker_build.sh
+++ b/dev-tools/docker_build.sh
@@ -80,7 +80,7 @@ do
     TEMP_TAG=`git rev-parse --short=14 HEAD`-$PLATFORM-$$
 
     prefetch_docker_base_image "$DOCKERFILE"
-    docker build --no-cache --force-rm -t $TEMP_TAG --build-arg VERSION_QUALIFIER="$VERSION_QUALIFIER" --build-arg SNAPSHOT=$SNAPSHOT --build-arg ML_DEBUG=$ML_DEBUG -f "$DOCKERFILE" .
+    docker build --no-cache --force-rm -t $TEMP_TAG --progress=plain --build-arg VERSION_QUALIFIER="$VERSION_QUALIFIER" --build-arg SNAPSHOT=$SNAPSHOT --build-arg ML_DEBUG=$ML_DEBUG -f "$DOCKERFILE" .
     # Using tar to copy the build artifacts out of the container seems more reliable
     # than docker cp, and also means the files end up with the correct uid/gid
     docker run --rm --workdir=/ml-cpp $TEMP_TAG bash -c "tar cf - build/distributions && sleep 30" | tar xvf -
diff --git a/dev-tools/docker_test.sh b/dev-tools/docker_test.sh
index aed18fa60..91b9e3a5b 100755
--- a/dev-tools/docker_test.sh
+++ b/dev-tools/docker_test.sh
@@ -88,7 +88,7 @@ do
     TEMP_TAG=`git rev-parse --short=14 HEAD`-$PLATFORM-$$
 
     prefetch_docker_base_image "$DOCKERFILE"
-    docker build --no-cache --force-rm -t $TEMP_TAG --build-arg VERSION_QUALIFIER="$VERSION_QUALIFIER" --build-arg SNAPSHOT=$SNAPSHOT --build-arg BOOST_TEST_OUTPUT_FORMAT_FLAGS=$BOOST_TEST_OUTPUT_FORMAT_FLAGS --build-arg ML_DEBUG=$ML_DEBUG -f "$DOCKERFILE" .
+    docker build --no-cache --force-rm -t $TEMP_TAG --progress=plain --build-arg VERSION_QUALIFIER="$VERSION_QUALIFIER" --build-arg SNAPSHOT=$SNAPSHOT --build-arg BOOST_TEST_OUTPUT_FORMAT_FLAGS=$BOOST_TEST_OUTPUT_FORMAT_FLAGS --build-arg ML_DEBUG=$ML_DEBUG -f "$DOCKERFILE" .
     # Using tar to copy the build and test artifacts out of the container seems
     # more reliable than docker cp, and also means the files end up with the
     # correct uid/gid
diff --git a/docs/CHANGELOG.asciidoc b/docs/CHANGELOG.asciidoc
index 3b119797c..f4510b40c 100644
--- a/docs/CHANGELOG.asciidoc
+++ b/docs/CHANGELOG.asciidoc
@@ -27,12 +27,17 @@
 //=== Bug Fixes
 
 //=== Regressions
+== {es} version 9.2.0
+
+=== Enhancements
 
 == {es} version 9.1.0
 
 === Enhancements
 
 * Track memory used in the hierarchical results normalizer. (See {ml-pull}2831[#2831].)
+* Update the PyTorch library to version 2.7.1. (See {ml-pull}2879[#2879].)
+
 
 === Bug Fixes
 
diff --git a/include/maths/common/CXMeans.h b/include/maths/common/CXMeans.h
index a8b1782af..c3e888cfe 100644
--- a/include/maths/common/CXMeans.h
+++ b/include/maths/common/CXMeans.h
@@ -26,6 +26,7 @@
 #include <algorithm>
 #include <cstddef>
 #include <cstdint>
+#include <ostream>
 #include <vector>
 
 namespace ml {
@@ -104,6 +105,15 @@ class CXMeans {
         //! Get the cluster checksum.
         std::uint64_t checksum() const { return m_Checksum; }
 
+        //! \brief Stream insertion operator for CCluster.
+        //! This is defined here for use in Boost unit tests to print clusters
+        //! when a test fails.
+        friend std::ostream& operator<<(std::ostream& strm, const CCluster& cluster) {
+            return strm << "Cluster{ cost: " << cluster.cost()
+                        << ", centre: " << cluster.centre().toDelimited()
+                        << ", points checksum: " << cluster.checksum() << " }";
+        }
+
     private:
         //! The information criterion cost of this cluster.
         double m_Cost;
diff --git a/lib/maths/common/unittest/CXMeansTest.cc b/lib/maths/common/unittest/CXMeansTest.cc
index 8accfd23e..756d349f5 100644
--- a/lib/maths/common/unittest/CXMeansTest.cc
+++ b/lib/maths/common/unittest/CXMeansTest.cc
@@ -32,41 +32,6 @@ using TVector2 = ml::maths::common::CVectorNx1<double, 2>;
 using TVector4 = ml::maths::common::CVectorNx1<double, 4>;
 using TVector4Vec = std::vector<TVector4>;
 
-// TODO boost test: replace these output operators
-// with a more generic way of printing clusters in
-// the production code
-namespace ml {
-namespace maths {
-namespace common {
-
-std::ostream& operator<<(std::ostream& strm,
-                         const typename CXMeans<TVector2>::CCluster& cluster) {
-    return strm << "Cluster{ cost: " << cluster.cost()
-                << ", centre: " << cluster.centre().toDelimited()
-                << ", points checksum: " << cluster.checksum() << " }";
-}
-
-std::ostream& operator<<(std::ostream& strm,
-                         const typename CXMeans<TVector4>::CCluster& cluster) {
-    return strm << "Cluster{ cost: " << cluster.cost()
-                << ", centre: " << cluster.centre().toDelimited()
-                << ", points checksum: " << cluster.checksum() << " }";
-}
-
-std::ostream& operator<<(std::ostream& strm,
-                         const typename CXMeans<TVector4Vec>::CCluster& cluster) {
-    strm << "Cluster{ cost: " << cluster.cost() << ", centre: ";
-    const char* delim{"("};
-    for (const auto& element : cluster.centre()) {
-        strm << delim << element.toDelimited() << ')';
-        delim = ", (";
-    }
-    return strm << ", points checksum: " << cluster.checksum() << " }";
-}
-}
-}
-}
-
 BOOST_AUTO_TEST_SUITE(CXMeansTest)
 
 using namespace ml;