AI Model Catalog | Microsoft Foundry Models

Model router

Version: 2025-11-18

Microsoft•Last updated November 2025

Model router is a deployable AI model that is trained to select the most suitable large language model (LLM) for a given prompt.

Multipurpose

Multimodal

Welcome to the 2025-11-18 version of model router. Model Router dynamically selects the optimal large language model (LLM) for a specific query or task in real time. By evaluating factors like query complexity, cost, and performance, it efficiently routes requests to the most suitable model, ensuring high quality results while minimizing costs. This version adds several new capabilities:

Support Global Standard and Data Zone Standard deployments.
Adds support for new models: grok-4, grok-4-fast-reasoning, DeepSeek-V3.1, gpt-oss-120b, Llama-4-Maverick-17B-128E-Instruct-FP8, gpt-4o, gpt-4o-mini, claude-haiku-4-5, claude-sonnet-4-5 and claude-opus-4-1.
Support for agentic scenarios including tools so you can now use it in the Foundry Agent service.
Quick deploy or Custom deploy with routing mode and model subset selections.
Routing mode: Optimize the routing logic for your needs. Supported options: Quality, Cost, Balanced (default).
Model subset: Select your models to create your model subset for routing.

For the latest information, reference the Model router documentation

Supported models

Router Version	Model	Model version
2025-11-18	gpt-5*	2025-08-07
	gpt-5-mini	2025-08-07
	gpt-5-nano	2025-08-07
	gpt-5-chat	2025-08-07
	gpt-4.1	2025-04-14
	gpt-4.1-mini	2025-04-14
	gpt-4.1-nano	2025-04-14
	gpt-4o	2024-11-20
	gpt-4o-mini	2024-07-18
	o4-mini	2025-04-16
	grok-4**	1
	grok-4-fast-reasoning**	1
	DeepSeek-V3.1**	1
	gpt-oss-120b**	1
	Llama-4-Maverick-17B-128E-Instruct-FP8**	1
	claude-haiku-4-5**	20251001
	claude-sonnet-4-5**	20250929
	claude-opus-4-1**	20250805

* Requires registration. Please refer to the particular model documentation for the latest information.
** Model router support for this model is in preview.

notes.md

evaluation.md

Model Specifications

Context Length1048576

LicenseCustom

Training DataNovember 2025

Last UpdatedNovember 2025

Input TypeText,Image

Output TypeText

ProviderMicrosoft

Languages1 Language

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