Update models-azure-direct-others.md

Author: ahughes-msft

articles/ai-foundry/foundry-models/includes/models-azure-direct-others.md

@@ -87,10 +87,14 @@ xAI's Grok models in Azure AI Foundry Models include a diverse set of models des
 
 - Grok 4 Fast, an efficiency-optimized language model that delivers near-Grok 4 reasoning capabilities with significantly lower latency and cost, and can bypass reasoning entirely for ultra-fast applications. It is trained for safe and effective tool use, with built-in refusal behaviors, a fixed safety-enforcing system prompt, and input filters to prevent misuse.
 
+- Grok 4 is the latest reasoning model from xAI with advanced reasoning and tool-use capabilities,
+enabling it to achieve new state-of-the-art performance across challenging academic and industry
+benchmarks. [Registration is required for access to the grok-4 model](https://aka.ms/xai/grok-4).
+
 
 | Model  | Type | Capabilities | Deployment type (region availability) | Project type |
 | ------ | ---- | ------------ | ------------------------------------- | ------------ |
-| [grok-4]()  | chat-completion | - **Input:** text, image (2,000,000 tokens) <br /> - **Output:** text (2,000,000 tokens) <br /> - **Languages:** `en` <br />  - **Tool calling:** yes <br /> - **Response formats:** text |- Global standard (all regions)  | Foundry, Hub-based |
+| [grok-4](https://ai.azure.com/explore/models/grok-4/version/1/registry/azureml-xai/?cid=learnDocs)  | chat-completion | - **Input:** text, image (256,000 tokens) <br /> - **Output:** text (8,192 tokens) <br /> - **Languages:** `en` <br />  - **Tool calling:** yes <br /> - **Response formats:** text |- Global standard (all regions)  | Foundry, Hub-based |
 | [grok-4-fast-reasoning](https://ai.azure.com/explore/models/grok-4-fast-reasoning/version/1/registry/azureml-xai/?cid=learnDocs)  | chat-completion | - **Input:** text, image (2,000,000 tokens) <br /> - **Output:** text (2,000,000 tokens) <br /> - **Languages:** `en` <br />  - **Tool calling:** yes <br /> - **Response formats:** text |- Global standard (all regions)  | Foundry, Hub-based |
 | [grok-4-fast-non-reasoning](https://ai.azure.com/explore/models/grok-4-fast-non-reasoning/version/1/registry/azureml-xai/?cid=learnDocs)  | chat-completion | - **Input:** text, image (2,000,000 tokens) <br /> - **Output:** text (2,000,000 tokens) <br /> - **Languages:** `en` <br />  - **Tool calling:** yes <br /> - **Response formats:** text |- Global standard (all regions)  | Foundry, Hub-based |
 | [grok-code-fast-1](https://ai.azure.com/explore/models/grok-code-fast-1/version/1/registry/azureml-xa/?cid=learnDocs)  | chat-completion | - **Input:** text (256,000 tokens) <br /> - **Output:** text (8,192 tokens) <br /> - **Languages:** `en` <br />  - **Tool calling:** yes <br /> - **Response formats:** text |- Global standard (all regions)  | Foundry, Hub-based |