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Copy file name to clipboardExpand all lines: hub/apps/windows-app-sdk/downloads.md
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title: Latest Windows App SDK downloads
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description: This page provides links to the latest downloads of the Windows App SDK (WASDK) for all three release channels (stable, preview, and experimental).
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ms.topic: article
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ms.date: 09/09/2025
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ms.date: 09/22/2025
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keywords: windows, winrt, win32, windows app development, Windows App SDK
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ms.localizationpriority: medium
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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 |[1.8.0 (1.8.250907003)](stable-channel.md#version-180-18250907003) (09/09/2025) |
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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 |[1.8.1 (1.8.250916003)](stable-channel.md#version-181-18250916003) (09/22/2025) |
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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 |[1.8.0-experimental4](experimental-channel.md#version-18-experimental-180-experimental4) (07/08/2025) |
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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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title: Stable channel release notes for the Windows App SDK
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description: Provides information about the stable release channel for the Windows App SDK.
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ms.topic: release-notes
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ms.date: 09/09/2025
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ms.date: 09/22/2025
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keywords: windows win32, windows app development, Windows App SDK
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For the updated runtime and MSIX, see [Downloads for the Windows App SDK](./downloads.md).
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### Version 1.8.0 (1.8.250907003)
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### Version 1.8.1 (1.8.250916003)
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This is the latest service release for Version 1.8 of the Windows App SDK.
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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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See [Get started with Phi Silica in the Windows App SDK](/windows/ai/apis/phi-silica) and [API ref for Phi Silica in the Windows App SDK](/windows/ai/apis/phi-silica-api-ref) for more information.
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#### Microsoft Windows ML
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[Windows ML](/windows/ai/new-windows-ml/overview) enables developers to run ONNX AI models locally on Windows PCs on a shared system-wide copy of the ONNX Runtime using dynamically-installed hardware-specific execution providers.
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**Key benefits:**
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-**Dynamically get latest EPs** - Automatically downloads and manages the latest hardware-specific execution providers
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-**Shared ONNX Runtime** - Uses system-wide runtime instead of bundling your own, reducing app size
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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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```
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Microsoft.Windows.AI.MachineLearning
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ExecutionProvider
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ExecutionProviderCatalog
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ExecutionProviderCertification
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ExecutionProviderReadyResult
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ExecutionProviderReadyResultState
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ExecutionProviderReadyState
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MachineLearningContract
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```
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```
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Microsoft.Windows.AI.Text
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LanguageModel
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CreateContext
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CreateContext
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CreateContext
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GenerateEmbeddingVectors
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GenerateEmbeddingVectors
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GenerateResponseAsync
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GenerateResponseAsync
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GenerateResponseAsync
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GenerateResponseFromEmbeddingsAsync
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GenerateResponseFromEmbeddingsAsync
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GenerateResponseFromEmbeddingsAsync
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GetUsablePromptLength
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GetUsablePromptLength
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GetVectorSpaceId
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```
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#### Known Issues
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- C# developers must manually reference the [System.Numerics.Tensors]() version 9.0.0 or greater NuGet package in order to use the `Microsoft.ML.OnnxRuntime.Tensors`. Without this NuGet package reference, you will experience the following runtime error when calling the `Microsoft.ML.OnnxRuntime.Tensors` APIs: `Could not load file or assembly 'System.Numerics.Tensors, Version=9.0.0.0`.
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### Version 1.8.0 (1.8.250907003)
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#### Windows AI APIs
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The Windows App SDK now includes a suite of artificial intelligence (AI) APIs that can be used with a local language model to perform a variety of tasks on Copilot+ PCs. Your apps can now intelligently respond to prompts, recognize text within images, describe the content of images, remove objects from images, and more.
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