@@ -4,7 +4,7 @@ titleSuffix: Azure OpenAI
 description: Learn about the different model capabilities that are available with Azure OpenAI.
 ms.service: azure-ai-openai
 ms.topic: conceptual
-ms.date: 09/09/2024
+ms.date: 09/12/2024
 ms.custom: references_regions, build-2023, build-2023-dataai, refefences_regions
 manager: nitinme
 author: mrbullwinkle #ChrisHMSFT
@@ -26,6 +26,23 @@ Azure OpenAI Service is powered by a diverse set of models with different capabi
 | [Whisper](#whisper-models) | A series of models in preview that can transcribe and translate speech to text. |
 | [Text to speech](#text-to-speech-models-preview) (Preview) | A series of models in preview that can synthesize text to speech. |
 
+## o1-preview and o1-mini models limited access
+
+The Azure OpenAI `o1-preview` and `o1-mini` models are specifically designed to tackle reasoning and problem-solving tasks with increased focus and capability. These models spend more time processing and understanding the user's request, making them exceptionally strong in areas like science, coding, and math compared to previous iterations.
+
+### Availability
+
+The `o1-preview` and `o1-mini` models are available in the East US2 region for limited access through the [AI Studio](https://ai.azure.com) early access playground. Data processing for the `o1` models may occur in a different region than where they are available for use.
+
+To try the `o1-preview` and `o1-mini` models in the early access playground, **registration is required, and access will be granted based on Microsoft’s eligibility criteria**.
+
+Request access: [limited access model application](https://aka.ms/oai/modelaccess)
+
+Once access has been granted, you will need to:
+
+1. Navigate to https://ai.azure.com/resources and select a resource in the `eastus2` region. If you do not have an Azure OpenAI resource in this region you will need to [create one](https://portal.azure.com/#create/Microsoft.CognitiveServicesOpenAI).  
+2. Once the `eastus2` Azure OpenAI resource is selected, in the upper left-hand panel under **Playgrounds** select **Early access playground (preview)**.
+
 ## GPT-4o and GPT-4 Turbo
 
 GPT-4o integrates text and images in a single model, enabling it to handle multiple data types simultaneously. This multimodal approach enhances accuracy and responsiveness in human-computer interactions. GPT-4o matches GPT-4 Turbo in English text and coding tasks while offering superior performance in non-English languages and vision tasks, setting new benchmarks for AI capabilities.

@@ -10,14 +10,57 @@ ms.custom:
   - ignite-2023
   - references_regions
 ms.topic: whats-new
-ms.date: 9/03/2024
+ms.date: 9/12/2024
 recommendations: false
 ---
 
 # What's new in Azure OpenAI Service
 
 This article provides a summary of the latest releases and major documentation updates for Azure OpenAI.
 
+## September 2024
+
+### NEW o1-preview and o1-mini models available for limited access
+
+The Azure OpenAI `o1-preview` and `o1-mini` models are specifically designed to tackle reasoning and problem-solving tasks with increased focus and capability. These models spend more time processing and understanding the user's request, making them exceptionally strong in areas like science, coding, and math compared to previous iterations.
+
+### Key capabilities of the o1 series
+
+- Complex Code Generation: Capable of generating algorithms and handling advanced coding tasks to support developers.
+- Advanced Problem Solving: Ideal for comprehensive brainstorming sessions and addressing multifaceted challenges.
+- Complex Document Comparison: Perfect for analyzing contracts, case files, or legal documents to identify subtle differences.
+- Instruction Following and Workflow Management: Particularly effective for managing workflows requiring shorter contexts.
+
+### Model variants
+
+- `o1-preview`: `o1-preview` is the more capable of the `o1` series models.  
+- `o1-mini`: `o1-mini` is the faster and cheaper of the `o1` series models.
+
+Model version: `2024-09-12`
+
+Request access: [limited access model application](https://aka.ms/oai/modelaccess)
+
+### Limitations
+
+The `o1-preview` and `o1-mini` models are currently in preview and do not include some features available in other models, such as image understanding and structured outputs found in the GPT-4o and GPT-4o-mini models. For many tasks, the generally available GPT-4o models may still be more suitable.
+
+### Safety
+
+OpenAI has incorporated additional safety measures into the `o1` models, including new techniques to help the models refuse unsafe requests. These advancements make the `o1` series some of the most robust models available.
+
+### Availability
+
+The `o1-preview` and `o1-mini` are available in the East US2 region for limited access through the [AI Studio](https://ai.azure.com) early access playground. Data processing for the `o1` models may occur in a different region than where they are available for use.
+
+To try the `o1-preview` and `o1-mini` models in the early access playground **registration is required, and access will be granted based on Microsoft’s eligibility criteria.**
+
+Request access: [limited access model application](https://aka.ms/oai/modelaccess)
+
+Once access has been granted, you will need to:
+
+1. Navigate to https://ai.azure.com/resources and select a resource in the `eastus2` region. If you do not have an Azure OpenAI resource in this region you will need to [create one](https://portal.azure.com/#create/Microsoft.CognitiveServicesOpenAI).  
+2. Once the `eastus2` Azure OpenAI resource is selected, in the upper left-hand panel under **Playgrounds** select **Early access playground (preview)**.
+ 
 ## August 2024
 
 ### GPT-4o 2024-08-06 structured outputs