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Wasdk/1.8/1.8.2 release notes (#5884)
* Release Notes V1 * Update stable-channel.md * Version Number added * Update stable-channel.md * Update stable-channel.md * Update stable-channel.md
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hub/apps/windows-app-sdk/downloads.md

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| Version | Runtime downloads |
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| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| [1.8.2 (1.8.251003001)](stable-channel.md#version-18) <br/> 10/14/2025 <br/> [Release notes](stable-channel.md#version-18) <br/> [Source](https://github.com/microsoft/microsoft-ui-xaml/releases/tag/winui3%2Frelease%2F1.8.2) | [Installer (x64)](https://aka.ms/windowsappsdk/1.8/1.8.251003001/windowsappruntimeinstall-x64.exe) <br/> [Installer (x86)](https://aka.ms/windowsappsdk/1.8/1.8.251003001/windowsappruntimeinstall-x86.exe) <br/> [Installer (arm64)](https://aka.ms/windowsappsdk/1.8/1.8.251003001/windowsappruntimeinstall-arm64.exe) <br/> [Redistributable](https://aka.ms/windowsappsdk/1.8/1.8.251003001/Microsoft.WindowsAppRuntime.Redist.1.8.zip) |
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| [1.8.1 (1.8.250916003)](stable-channel.md#version-18) <br/> 09/22/2025 <br/> [Release notes](stable-channel.md#version-18) <br/> [Source](https://github.com/microsoft/microsoft-ui-xaml/releases/tag/winui3%2Frelease%2F1.8.1) | [Installer (x64)](https://aka.ms/windowsappsdk/1.8/1.8.250916003/windowsappruntimeinstall-x64.exe) <br/> [Installer (x86)](https://aka.ms/windowsappsdk/1.8/1.8.250916003/windowsappruntimeinstall-x86.exe) <br/> [Installer (arm64)](https://aka.ms/windowsappsdk/1.8/1.8.250916003/windowsappruntimeinstall-arm64.exe) <br/> [Redistributable](https://aka.ms/windowsappsdk/1.8/1.8.250916003/Microsoft.WindowsAppRuntime.Redist.1.8.zip) |
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| [1.8.0 (1.8.250907003)](stable-channel.md#version-18) <br/> 09/09/2025 <br/> [Release notes](stable-channel.md#version-18) <br/> [Source](https://github.com/microsoft/microsoft-ui-xaml/releases/tag/winui3%2Frelease%2F1.8.0) | [Installer (x64)](https://aka.ms/windowsappsdk/1.8/1.8.250907003/windowsappruntimeinstall-x64.exe) <br/> [Installer (x86)](https://aka.ms/windowsappsdk/1.8/1.8.250907003/windowsappruntimeinstall-x86.exe) <br/> [Installer (arm64)](https://aka.ms/windowsappsdk/1.8/1.8.250907003/windowsappruntimeinstall-arm64.exe) <br/> [Redistributable](https://aka.ms/windowsappsdk/1.8/1.8.250907003/Microsoft.WindowsAppRuntime.Redist.1.8.zip) |
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hub/apps/windows-app-sdk/release-channels.md

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| | Channel | Description | Release cadence | Supported? | Latest release |
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| --------- | ------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------- | ---------- | ----------------------------------------------------------------------------------------------------- |
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| **** | Stable ([release notes](stable-channel.md)) | This channel is supported for use by apps in production environments. It includes only stable APIs. | No more frequent than every six months<br>(+ servicing) | Yes | [1.8.1 (1.8.250916003)](stable-channel.md#version-181-18250916003) (09/22/2025) |
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| **** | Stable ([release notes](stable-channel.md)) | This channel is supported for use by apps in production environments. It includes only stable APIs. | No more frequent than every six months<br>(+ servicing) | Yes | [1.8.2 (1.8.251003001)](stable-channel.md#version-182-18251003001) (10/14/2025) |
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| **❇️** | Preview ([release notes](preview-channel.md)) | This channel provides a preview of the next stable release. There may be breaking API changes between a given preview channel release and the next stable release. | At least one preview per stable version | No | [Version 1.8 Preview (1.8-preview)](preview-channel.md#version-18-preview-18-preview) (08/19/2025) |
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| **🔄️** | Experimental ([release notes](experimental-channel.md)) | This channel includes experimental features that are in early stages of development. Experimental features may be removed from the next release, or may never be released. | As needed when requiring feedback for features in early design or prototype stages | No | [2.0.0-experimental1](experimental-channel.md#version-20-experimental-200-experimental1) (10/02/2025) |
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| Windows App SDK version | Original release date | Latest patch version | Patch release date | Support level | End of servicing |
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| ----------------------- | --------------------- | -------------------- | ------------------ | -------------- | ---------------- |
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| 1.8 | 09/09/2025 | 1.8.250916003 | 09/22/2025 | Current | 09/09/2026 |
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| 1.8 | 10/14/2025 | 1.8.251003001 | 10/14/2025 | Current | 09/09/2026 |
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| 1.7 | 03/18/2025 | 1.7.250909003 | 09/16/2025 | Maintenance | 03/18/2026 |
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| 1.6 | 09/04/2024 | 1.6.250602001 | 06/10/2025 | Out of Support | 09/04/2025 |
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| 1.5 | 02/29/2024 | 1.5.250108004 | 01/15/2025 | Out of Support | 02/28/2025 |

hub/apps/windows-app-sdk/stable-channel.md

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For the updated runtime and MSIX, see [Downloads for the Windows App SDK](./downloads.md).
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### Version 1.8.1 (1.8.250916003)
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### Version 1.8.2 (1.8.251003001)
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This is the latest service release for Version 1.8 of the Windows App SDK.
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#### Updated ONNX Runtime
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Updated the `onnxruntime.dll` to 1.23.1 introducing several enhancements to ONNX Runtime's Python and C++ APIs, focusing on improved device and memory information handling, synchronization stream support, and tensor copy functionality. It adds new Python bindings for device/memory types, exposes more detailed session input/output metadata, and provides a Python-accessible tensor copy API. The changes also refactor and extend the C++ API for better stream and memory info management.
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**Key enhancements include:**
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* Python bindings for `OrtMemoryInfoDeviceType`, `OrtDeviceMemoryType`, and expanded `OrtDevice` to expose the memory type via a new `mem_type` method. The `OrtMemoryInfo` Python class now supports both legacy and new V2 constructors and exposes additional properties such as device memory type and Vendor ID.
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* Extended the Python `InferenceSession` object to provide access to imput/output `OrtMemoryInfo` and `OrtEpDevice` objects through new properties and methods
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* Introduced Python bindings for `OrtSyncStream`, including creation via `OrtEpDevice.create_sync_stream()` and retrieval of device-specific `OrtMemoryInfo` via `OrtEpDevice.memory_info()`.
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* Refactored the C++ API to generalize `SyncStream` handling, allowing for unowned streams and improved type safety.
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* Added a new Python-level `copy_tensors` function and corresponding C++ binding, enabling efficient copying of tensor data between OrtValue objects, optionally using a synchronization stream.
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* Changed the return type of the `OrtValue.data_ptr` method in the Python binding from `int64_t` to `uintptr_t` for better cross-platform compatibility.
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* Minor improvements to error messages and device type handling in the Python API (e.g., for OrtDevice).
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* Addressed edge cases in memory information handling
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* Resolved minor issues to improve stability and reliability
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#### Bug fixes
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* Fixed deployment handler code to report the actual failure HRESULT for increased clarity when troubleshooting.
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### Version 1.8.1 (1.8.250916003)
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#### LanguageModel text generation
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LanguageModel is now available using [**Phi Silica**](/windows/ai/apis/phi-silica) to generate text responses to broad user prompts with built in content moderation. Phi Silica, Microsoft's most powerful NPU-tuned local language model, is optimized for efficiency and performance on Windows Copilot+ PCs devices while still offering many of the capabilities found in Large Language Models (LLMs).
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- **Smaller downloads/installs** - No need to carry large EPs and the ONNX Runtime in your app
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- **Broad hardware support** - Runs on all Windows 11 PCs (x64 and ARM64) with any hardware configuration
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### New APIs for 1.8.1
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This release includes the following new APIs compared to the previous 1.8 release:

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