Pin OpenVINO CI to the 2026.4.1 release instead of a deleted nightly

.ci/scripts/setup-openvino.sh

@@ -18,26 +18,27 @@ for arg in "$@"; do
   esac
 done
 
-# Download and install OpenVINO from release packages
-OPENVINO_VERSION="2026.0"
-OPENVINO_BUILD="2026.0.0.20965.c6d6a13a886"
-OPENVINO_STABLE_URL="https://storage.openvinotoolkit.org/repositories/openvino/packages/${OPENVINO_VERSION}/linux/openvino_toolkit_ubuntu22_${OPENVINO_BUILD}_x86_64.tgz"
-
-OPENVINO_NIGHTLY_BUILD_ID="2026.1.0-21310-c694fbc2b6d"
-OPENVINO_NIGHTLY_BUILD="2026.1.0.dev20260312"
-OPENVINO_NIGHTLY_URL="https://storage.openvinotoolkit.org/repositories/openvino/packages/nightly/${OPENVINO_NIGHTLY_BUILD_ID}/openvino_toolkit_ubuntu22_${OPENVINO_NIGHTLY_BUILD}_x86_64.tgz"
-
+OPENVINO_PACKAGES_URL="https://storage.openvinotoolkit.org/repositories/openvino/packages"
 if [ "${USE_NIGHTLY}" = true ]; then
-  OPENVINO_URL="${OPENVINO_NIGHTLY_URL}"
-  OPENVINO_EXTRACTED_DIR="openvino_toolkit_ubuntu22_${OPENVINO_NIGHTLY_BUILD}_x86_64"
-  echo "Using OpenVINO nightly build: ${OPENVINO_NIGHTLY_BUILD_ID}"
+  # Only for quick testing. OpenVINO deletes nightlies after a few months, so
+  # take the newest one instead of pinning a build that will disappear.
+  OPENVINO_URL=$(curl -fsSL --retry 3 --retry-all-errors "${OPENVINO_PACKAGES_URL}/nightly/latest.txt" | sed -n 's/^ubuntu22_x86_64://p')
+  : "${OPENVINO_URL:?could not get the ubuntu22_x86_64 nightly from latest.txt}"
+  OPENVINO_SHA256=$(curl -fsSL --retry 3 --retry-all-errors "${OPENVINO_URL}.sha256" | sed -nE 's/^([0-9a-f]{64}).*/\1/p')
+  : "${OPENVINO_SHA256:?could not get the SHA-256 of the nightly from its .sha256 file}"
 else
-  OPENVINO_URL="${OPENVINO_STABLE_URL}"
-  OPENVINO_EXTRACTED_DIR="openvino_toolkit_ubuntu22_${OPENVINO_BUILD}_x86_64"
-  echo "Using OpenVINO stable release: ${OPENVINO_BUILD}"
+  OPENVINO_VERSION="2026.4.1"
+  OPENVINO_BUILD="2026.4.1.22982.07f9c262b05"
+  OPENVINO_SHA256="e2541afe65a81d5aabe981f9a86ad2c7efe557922b71e5649b6aafffec7c982b"
+  OPENVINO_URL="${OPENVINO_PACKAGES_URL}/${OPENVINO_VERSION}/linux/openvino_toolkit_ubuntu22_${OPENVINO_BUILD}_x86_64.tgz"
 fi
+OPENVINO_EXTRACTED_DIR=$(basename "${OPENVINO_URL}" .tgz)
+echo "Using OpenVINO: ${OPENVINO_EXTRACTED_DIR}"
 
-curl -Lo /tmp/openvino_toolkit.tgz --retry 3 --retry-all-errors --fail ${OPENVINO_URL}
+curl -Lo /tmp/openvino_toolkit.tgz --retry 3 --retry-all-errors --fail "${OPENVINO_URL}"
+# The storage server answers a missing file with an HTML page and HTTP 200, so
+# compare the download with the expected hash before extracting it.
+echo "${OPENVINO_SHA256}  /tmp/openvino_toolkit.tgz" | sha256sum -c -
 tar -xzf /tmp/openvino_toolkit.tgz
 mv "${OPENVINO_EXTRACTED_DIR}" openvino
 

.ci/scripts/test_backend.sh

@@ -119,7 +119,7 @@ fi
 
 if [[ "$FLOW" == *openvino* ]]; then
     # Setup OpenVINO environment
-    source .ci/scripts/setup-openvino.sh --nightly
+    source .ci/scripts/setup-openvino.sh
     EXTRA_BUILD_ARGS+=" -DEXECUTORCH_BUILD_OPENVINO=ON"
 fi
 

.ci/scripts/test_yolo26.sh

@@ -76,8 +76,7 @@ if [[ "${MODE}" =~ .*openvino.* ]]; then
   OPENVINO=ON
   TARGET_LIBS="$TARGET_LIBS openvino_backend "
 
-  # Install specific OpenVINO runtime from pip.
-  $PYTHON_EXECUTABLE -m pip install --pre openvino==2026.1.0.dev20260131 --extra-index-url https://storage.openvinotoolkit.org/simple/wheels/nightly
+  $PYTHON_EXECUTABLE -m pip install openvino==2026.4.1
   $PYTHON_EXECUTABLE -m pip install -r backends/openvino/requirements.txt
 
   # Set OPENVINO_LIB_PATH so the C++ demo runner can also find libopenvino_c.so.

.github/workflows/test-backend-openvino.yml

@@ -10,6 +10,8 @@ on:
       - ciflow/nightly/*
   pull_request:
     paths:
+      - .ci/scripts/setup-openvino.sh
+      - .ci/scripts/test_backend.sh
       - .github/workflows/test-backend-openvino.yml
       - .github/workflows/_test_backend.yml
   workflow_dispatch:

README-wheel.md

@@ -37,8 +37,8 @@ to run ExecuTorch `.pte` files, with some restrictions:
 * \[Linux and Windows] [OpenVINO](docs/source/build-run-openvino.md) backend is also linked into the
   prebuilt module. OpenVINO requires the runtime to be installed separately:
   `pip install executorch[openvino]`. For now the extra installs no runtime on Python 3.15,
-  or on Linux aarch64 with Python 3.14, because the OpenVINO versions it supports publish no
-  build there.
+  or on Linux aarch64 with Python 3.14. OpenVINO publishes no build for Python 3.15, and its
+  aarch64 builds for Python 3.14 need glibc 2.35 or newer.
 
 On Linux, macOS and Windows the runtime, kernels and backends also ship as shared libraries
 with headers and a CMake package, so a C++ application can link them without building

backends/openvino/README.md

@@ -20,7 +20,7 @@ On Linux and Windows, the OpenVINO backend is included in the ExecuTorch pip whe
 pip install executorch[openvino]
 ```
 
-For now the extra installs no runtime on Python 3.15, or on Linux aarch64 with Python 3.14, because the OpenVINO versions it supports publish no build there.
+For now the extra installs no runtime on Python 3.15, or on Linux aarch64 with Python 3.14. OpenVINO publishes no build for Python 3.15, and its aarch64 builds for Python 3.14 need glibc 2.35 or newer.
 
 The backend automatically discovers the OpenVINO C library from the pip-installed package, so no library search path setup is needed.
 

backends/openvino/runtime/OpenvinoBackend.cpp

@@ -212,7 +212,7 @@ bool OpenvinoBackend::ensure_loaded() const {
           Error,
           "OpenVINO runtime not found (loading '%s' failed: %s). "
           "Ensure '%s' can be found (%s), or install with: "
-          "pip install \"openvino>=2025.1.0,<2026.0.0\"",
+          "pip install \"openvino>=2025.1.0,<2027.0.0\"",
           to_utf8(effective_path).c_str(),
           error.c_str(),
           to_utf8(kDefaultLibName).c_str(),

docs/source/build-run-openvino.md

@@ -44,7 +44,8 @@ pip install executorch[openvino]
 ```
 
 For now the extra installs no runtime on Python 3.15, or on Linux aarch64 with Python
-3.14, because the OpenVINO versions it supports publish no build there.
+3.14. OpenVINO publishes no build for Python 3.15, and its aarch64 builds for Python 3.14
+need glibc 2.35 or newer.
 
 The backend automatically discovers the OpenVINO C library from the pip-installed
 package — no environment variable setup is needed.
@@ -60,7 +61,7 @@ If you need a custom build (different platform, custom configuration, etc.), fol
 Before you begin, ensure you have the OpenVINO runtime installed and configured on your system. For most users, we recommend installing it via pip:
 
 ```bash
-pip install "openvino>=2025.1.0,<2026.0.0"
+pip install "openvino>=2025.1.0,<2027.0.0"
 ```
 
 Alternatively, you can build OpenVINO from source or follow the official [OpenVINO installation guide](https://docs.openvino.ai/2025/get-started/install-openvino.html) for platform-specific options:

docs/source/using-executorch-cpp.md

@@ -273,7 +273,8 @@ Without it the delegate still registers and the program still links, and the fai
 when the model is loaded.
 
 For now the openvino extra installs no runtime on Python 3.15, or on Linux aarch64 with
-Python 3.14, because the OpenVINO versions it supports publish no build there.
+Python 3.14. OpenVINO publishes no build for Python 3.15, and its aarch64 builds for Python
+3.14 need glibc 2.35 or newer.
 
 The MLX delegate has a similar requirement. Its Metal kernels live in a separate `mlx.metallib`
 file, which MLX looks for next to whichever library holds MLX code. The wheel ships it beside the

examples/models/yolo26/README.md

@@ -16,9 +16,9 @@ To install ExecuTorch, follow this [guide](https://pytorch.org/executorch/stable
 
 - [OpenVINO backend installation guide](../../../backends/openvino/README.md#quick-start-pip-wheel)
 
-> **_NOTE:_**  Please install the OpenVINO nightly version that supports the YOLO26 model.
+> **_NOTE:_**  Please install the OpenVINO version that supports the YOLO26 model.
 ```bash
-python -m pip install --pre openvino==2026.1.0.dev20260131 --extra-index-url https://storage.openvinotoolkit.org/simple/wheels/nightly
+python -m pip install openvino==2026.4.1
 ```
 
 - [XNNPACK backend installation guide](https://pytorch.org/executorch/stable/tutorial-xnnpack-delegate-lowering.html#running-the-xnnpack-model-with-cmake)

pyproject.toml

@@ -86,9 +86,10 @@ ethos_u = [
   "tosa-tools==2026.5.0",
 ]
 openvino = [
-  # The OpenVINO versions in this range publish no build for Python 3.15, or for Linux
-  # aarch64 on Python 3.14, so without these bounds pip fails to install the extra there.
-  "openvino>=2025.1.0,<2026.0.0; (platform_system == 'Linux' or (platform_system == 'Windows' and platform_machine == 'AMD64')) and python_version < '3.15' and (platform_machine != 'aarch64' or python_version < '3.14')",
+  # OpenVINO publishes no build for Python 3.15, and its Linux aarch64 builds for Python
+  # 3.14 need glibc 2.35 while the wheel needs only 2.28. Without these bounds pip fails to
+  # install the extra on Python 3.15 and on those older aarch64 systems.
+  "openvino>=2025.1.0,<2027.0.0; (platform_system == 'Linux' or (platform_system == 'Windows' and platform_machine == 'AMD64')) and python_version < '3.15' and (platform_machine != 'aarch64' or python_version < '3.14')",
 ]
 
 [project.urls]