add (some) model info

Author: PatrickFarley

articles/ai-services/openai/concepts/models.md

@@ -19,6 +19,7 @@ Azure OpenAI Service is powered by a diverse set of models with different capabi
 | Models | Description |
 |--|--|
 | [GPT-4.1 series](#gpt-41-series) | Latest model release from Azure OpenAI |
+| [model-router](#model-router) | A model that intelligently selects from a set of underlying chat models to respond to a given prompt. |
 | [computer-use-preview](#computer-use-preview) | An experimental model trained for use with the Responses API computer use tool. |
 | [GPT-4.5 Preview](#gpt-45-preview) |The latest GPT model that excels at diverse text and image tasks.  |
 | [o-series models](#o-series-models) |[Reasoning models](../how-to/reasoning.md) with advanced problem-solving and increased focus and capability.  |
@@ -31,7 +32,7 @@ Azure OpenAI Service is powered by a diverse set of models with different capabi
 
 ## GPT 4.1 series
 
-### Region Availability
+### Region availability
 
 | Model | Region |
 |---|---|
@@ -47,6 +48,21 @@ Azure OpenAI Service is powered by a diverse set of models with different capabi
 | `gpt-4.1-nano` (2025-04-14) <br><br> **Fastest 4.1 model** | - Text & image input <br> - Text output <br> - Chat completions API <br>- Responses API <br> - Streaming <br> - Function calling <br> Structured outputs (chat completions)   | 1,047,576  | 32,768 | May 31, 2024 |
 | `gpt-4.1-mini` (2025-04-14) | - Text & image input <br> - Text output <br> - Chat completions API <br>- Responses API <br> - Streaming <br> - Function calling <br> Structured outputs (chat completions)   | 1,047,576  | 32,768 | May 31, 2024 |
 
+## model-router
+
+A model that intelligently selects from a set of underlying chat models to respond to a given prompt.
+
+### Region availability
+
+| Model | Region |
+|---|---|
+| `model-router` (2025-04-15) | East US2 (Global Standard), Sweden Central (Global Standard)|
+
+### Capabilities 
+
+|  Model ID  | Description | Context Window | Max Output Tokens | Training Data (up to)  |
+|  --- |  :--- |:--- |:---|:---: |
+| `model-router` (2025-04-15) | A model that intelligently selects from a set of underlying chat models to respond to a given prompt. <br> -TBD | 128,000 | 4096 | N/A |
 
 ## computer-use-preview
 
@@ -63,7 +79,7 @@ Request access: [`computer-use-preview` limited access model application](https:
 
 Once access has been granted, you will need to create a deployment for the model.
 
-### Region Availability
+### Region availability
 
 | Model | Region |
 |---|---|
@@ -78,7 +94,7 @@ Once access has been granted, you will need to create a deployment for the model
 
 ## GPT-4.5 Preview
 
-### Region Availability
+### Region availability
 
 | Model | Region |
 |---|---|
@@ -88,7 +104,7 @@ Once access has been granted, you will need to create a deployment for the model
 
 |  Model ID  | Description | Context Window | Max Output Tokens | Training Data (up to)  |
 |  --- |  :--- |:--- |:---|:---: |
-| `gpt-4.5-preview` (2025-02-27) <br> **GPT-4.5 Preview**  | [GPT 4.1](#gpt-41-series) is the recommended replacement for this model. Excels at diverse text and image tasks. <br>-Structured outputs <br>-Prompt caching <br>-Tools <br>-Streaming<br>-Text(input/output)<br>- Image(input)   | 128,000 | 16,384 | Oct 2023 |
+| `gpt-4.5-preview` (2025-02-27) <br> **GPT-4.5 Preview**  | [GPT 4.1](#gpt-41-series) is the recommended replacement for this model. Excels at diverse text and image tasks. <br>- Structured outputs <br>- Prompt caching <br>- Tools <br>- Streaming<br>- Text(input/output)<br>- Image(input)   | 128,000 | 16,384 | Oct 2023 |
 
 > [!NOTE]
 > It is expected behavior that the model cannot answer questions about itself. If you want to know when the knowledge cutoff for the model's training data is, or other details about the model you should refer to the model documentation above.