Model router
Version: 2025-08-07
Welcome to the
Otherwise, you can register for access using the gpt-5 and model router limited access application form .
2025-08-07 version of model router that supports gpt-5 models in addition to the previously supported gpt-4 and o4-mini models.
This version is currently limited access only. If you already have o3 or gpt-5 access, no request is required.Otherwise, you can register for access using the gpt-5 and model router limited access application form .
Note: If you are not yet registered, the previous version,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. Context length for model router is dependent on the underlying model that's being used for each prompt. For more information, reference the Model router documentation2025-05-19with support for thegpt-4.1ando4-minimodels will be offered for deployment.
Model version in the router
| Router Version | Model | Model version | Availability | Lifecycle |
|---|---|---|---|---|
| 2025-08-07 | gpt-5 | 2025-08-07 | Global standard | General available |
| gpt-5-mini | 2025-08-07 | Global standard | General available | |
| gpt-5-nano | 2025-08-07 | Global standard | General available | |
| gpt-5-chat | 2025-08-07 | Global standard | Preview | |
| gpt-4.1 | 2025-04-14 | Global standard | General available | |
| gpt-4.1-mini | 2025-04-14 | Global standard | General available | |
| gpt-4.1-nano | 2025-04-14 | Global standard | General available | |
| o4-mini | 2025-04-16 | Global standard | General available |
Model Specifications
Context Length1048576
LicenseCustom
Training DataAugust 2025
Last UpdatedAugust 2025
Input TypeText,Image
Output TypeText
PublisherMicrosoft
Languages1 Language