# Microsoft.Extensions.AI

Published articles for Microsoft.Extensions.AI.

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## Routing and Failover for Microsoft.Extensions.AI

DevFeed: [Routing and Failover for Microsoft.Extensions.AI](<https://devfeed.tech/articles/routing-and-failover-for-microsoft-extensions-ai-2953.md>)

Original publisher: [Read original article](<https://devblogs.microsoft.com/dotnet/routing-and-failover-for-microsoft-extensions-ai/>)

Author: Joshua Yue

Published: 2026-08-13T19:30:00Z

Content type: article

Language: en

Sources: [.NET Blog](<https://devfeed.tech/sources/net-blog.md>)

Topics: [AI Chat](<https://devfeed.tech/topics/ai-chat.md>), [.NET](<https://devfeed.tech/topics/net.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [ai-routing](<https://devfeed.tech/tags/ai-routing.md>), [c-sharp](<https://devfeed.tech/tags/c-sharp.md>), [cache](<https://devfeed.tech/tags/cache.md>), [embeddings](<https://devfeed.tech/tags/embeddings.md>), [generative-ai](<https://devfeed.tech/tags/generative-ai.md>), [latency](<https://devfeed.tech/tags/latency.md>), [llm](<https://devfeed.tech/tags/llm.md>), [microsoft-extensions-ai](<https://devfeed.tech/tags/microsoft-extensions-ai.md>), [models](<https://devfeed.tech/tags/models.md>), [net](<https://devfeed.tech/tags/net.md>), [routing](<https://devfeed.tech/tags/routing.md>)

### AI overview

Microsoft.Extensions.AI introduces experimental routing and failover primitives for directing chat requests across models and providers. The article covers custom routing policies, semantic routing using embeddings, option handling across attempts, and constraints when switching providers during reasoning conversations.

### Source excerpt

Route requests across models and providers natively in Microsoft.Extensions.AI with RoutingChatClient, SemanticRoutingChatClient, and FailoverChatClient -- new experimental primitives for content-based routing, failover, and custom routing policies. The post Routing and Failover for Microsoft.Extensions.AI appeared first on .NET Blog.