fix

Author: laujan

articles/ai-services/openai/concepts/provisioned-throughput.md

@@ -106,7 +106,7 @@ The minimum PTU deployment, increments, and processing capacity associated with
 
 ## Capacity transparency
 
-Azure OpenAI is a highly sought-after service where customer demand might exceed service GPU capacity. Microsoft strives to provide capacity for all in-demand regions and models, but selling out a region is always a possibility. This constraint can limit some customers’ ability to create a deployment of their desired model, version, or number of PTUs in a desired region - even if they have quota available in that region. Generally speaking:
+Azure OpenAI is a highly sought-after service where customer demand might exceed service GPU capacity. Microsoft strives to provide capacity for all in-demand regions and models, but selling out a region is always a possibility. This constraint can limit some customers' ability to create a deployment of their desired model, version, or number of PTUs in a desired region - even if they have quota available in that region. Generally speaking:
 
 - Quota places a limit on the maximum number of PTUs that can be deployed in a subscription and region, and does not guarantee of capacity availability. 
 - Capacity is allocated at deployment time and is held for as long as the deployment exists.  If service capacity is not available, the deployment will fail
@@ -151,29 +151,29 @@ The [Provisioned-Managed Utilization V2 metric](../how-to/monitoring.md#azure-op
 The 429 response isn't an error, but instead part of the design for telling users that a given deployment is fully utilized at a point in time. By providing a fast-fail response, you have control over how to handle these situations in a way that best fits your application requirements.
 
 The  `retry-after-ms` and `retry-after` headers in the response tell you the time to wait before the next call will be accepted. How you choose to handle this response depends on your application requirements. Here are some considerations:
--	You can consider redirecting the traffic to other models, deployments, or experiences. This option is the lowest-latency solution because the action can be taken as soon as you receive the 429 signal. For ideas on how to effectively implement this pattern see this [community post](https://github.com/Azure/aoai-apim).
--	If you're okay with longer per-call latencies, implement client-side retry logic. This option gives you the highest amount of throughput per PTU. The Azure OpenAI client libraries include built-in capabilities for handling retries.
+-    You can consider redirecting the traffic to other models, deployments, or experiences. This option is the lowest-latency solution because the action can be taken as soon as you receive the 429 signal. For ideas on how to effectively implement this pattern see this [community post](https://github.com/Azure/aoai-apim).
+-    If you're okay with longer per-call latencies, implement client-side retry logic. This option gives you the highest amount of throughput per PTU. The Azure OpenAI client libraries include built-in capabilities for handling retries.
 
 #### How does the service decide when to send a 429?
 
 In the Provisioned-Managed and Global Provisioned-Managed offerings, each request is evaluated individually according to its prompt size, expected generation size, and model to determine its expected utilization. This is in contrast to pay-as-you-go deployments, which have a [custom rate limiting behavior](../how-to/quota.md) based on the estimated traffic load. For pay-as-you-go deployments this can lead to HTTP 429 errors being generated prior to defined quota values being exceeded if traffic is not evenly distributed.
 
 For Provisioned-Managed and Global Provisioned-Managed, we use a variation of the leaky bucket algorithm to maintain utilization below 100% while allowing some burstiness in the traffic. The high-level logic is as follows:
 
-1.	Each customer has a set amount of capacity they can utilize on a deployment
+1.    Each customer has a set amount of capacity they can utilize on a deployment
 1. When a request is made:
 
-   a.	When the current utilization is above 100%, the service returns a 429 code with the `retry-after-ms` header set to the time until utilization is below 100%
+   a.    When the current utilization is above 100%, the service returns a 429 code with the `retry-after-ms` header set to the time until utilization is below 100%
 
-   b.	Otherwise, the service estimates the incremental change to utilization required to serve the request by combining prompt tokens and the specified `max_tokens` in the call. For requests that include at least 1024 cached tokens, the cached tokens are subtracted from the prompt token value. A customer can receive up to a 100% discount on their prompt tokens depending on the size of their cached tokens. If the `max_tokens` parameter is not specified, the service estimates a value. This estimation can lead to lower concurrency than expected when the number of actual generated tokens is small.  For highest concurrency, ensure that the `max_tokens` value is as close as possible to the true generation size. 
+   b.    Otherwise, the service estimates the incremental change to utilization required to serve the request by combining prompt tokens and the specified `max_tokens` in the call. For requests that include at least 1024 cached tokens, the cached tokens are subtracted from the prompt token value. A customer can receive up to a 100% discount on their prompt tokens depending on the size of their cached tokens. If the `max_tokens` parameter is not specified, the service estimates a value. This estimation can lead to lower concurrency than expected when the number of actual generated tokens is small.  For highest concurrency, ensure that the `max_tokens` value is as close as possible to the true generation size. 
 
-3.	When a request finishes, we now know the actual compute cost for the call. To ensure an accurate accounting, we correct the utilization using the following logic:
+3.    When a request finishes, we now know the actual compute cost for the call. To ensure an accurate accounting, we correct the utilization using the following logic:
 
-    a.	If the actual > estimated, then the difference is added to the deployment's utilization
+    a.    If the actual > estimated, then the difference is added to the deployment's utilization
 
-    b.	If the actual < estimated, then the difference is subtracted. 
+    b.    If the actual < estimated, then the difference is subtracted. 
 
-4.	The overall utilization is decremented down at a continuous rate based on the number of PTUs deployed. 
+4.    The overall utilization is decremented down at a continuous rate based on the number of PTUs deployed. 
 
 > [!NOTE]
 > Calls are accepted until utilization reaches 100%. Bursts just over 100% may be permitted in short periods, but over time, your traffic is capped at 100% utilization.