Enable or disable semantic ranker billing

Semantic ranker is a premium feature billed by usage. By default, all search services are enrolled in the free plan, which provides a monthly request allowance at no charge. To enable continued access after the free quota is consumed, you can switch to the standard plan.

Starting with Search Service REST API version 2026-04-01, billing consent for semantic ranker and agentic retrieval is separate. Use semanticSearch to control billing for semantic ranker and knowledgeRetrieval to control billing for agentic retrieval.

Prerequisites

• An Azure AI Search service in any region that provides semantic ranker.

• Owner or Contributor permissions on the search service.

• Search Management REST API version 2026-03-01-preview or later to set the semanticSearch property.

Billing split

You set billing consent using the Search Management REST API. The following table shows which property takes effect based on the Search Service REST API version your application uses.

Search Service REST API version	Semantic ranker billing	Agentic retrieval billing
2026-04-01 and later	Controlled by semanticSearch	Controlled by knowledgeRetrieval
2025-11-01-preview and earlier	Controlled by semanticSearch	Controlled by semanticSearch

For Search Service REST API version 2026-04-01 and later, semanticSearch affects only semantic ranker billing. To control agentic retrieval billing, see Enable or disable agentic retrieval billing.

For Search Service REST API version 2025-11-01-preview and earlier, semanticSearch controls consent for both semantic ranker and paid agentic retrieval usage.

Billing plans

Semantic ranker has two billing plans. For pricing by currency, see Azure AI Search pricing.

Plan	Description	Availability
Free (default)	Provides a monthly free request allowance. After the free allowance is consumed, semantic ranker requests return a billing error.	Available on all pricing tiers.
Standard	Pay-as-you-go pricing after the monthly free allowance is consumed.	Requires the Basic tier or higher.

Enable semantic ranker billing

Follow these steps to switch semantic ranker to the standard billing plan. The billing plan applies at the service level and affects all indexes.

Azure portal

1. Go to your search service in the Azure portal.

2. On the Overview page, make sure the pricing tier is Basic or higher.

3. From the left pane, select Settings > Premium features.

4. Under Semantic ranker, select Select plan in the Standard card.

   

REST

Use Services - Create Or Update (Search Management REST API) to set semanticSearch to standard:

PATCH https://management.azure.com/subscriptions/{{subscriptionId}}/resourcegroups/{{resource-group}}/providers/Microsoft.Search/searchServices/{{search-service-name}}?api-version=2026-03-01-preview
Content-Type: application/json
Authorization: Bearer {{token}}

{
  "properties": {
    "semanticSearch": "standard"
  }
}

Management REST API calls are authenticated through Microsoft Entra ID. For instructions on how to authenticate, see Manage your Azure AI Search service with REST APIs.

Note

Create or Update supports two HTTP methods: PUT and PATCH. Both PUT and PATCH can be used to update existing services, but only PUT can be used to create a new service. If PUT is used to update an existing service, it replaces all properties in the service with their defaults if they aren't specified in the request. When PATCH is used to update an existing service, it only replaces properties that are specified in the request. When using PUT to update an existing service, it's possible to accidentally introduce an unexpected scaling or configuration change. When enabling semantic ranking on an existing service, it's recommended to use PATCH instead of PUT.

Disable semantic ranker billing

Follow these steps to switch semantic ranker back to the free billing plan.

Azure portal

1. Go to your search service in the Azure portal.

2. From the left pane, select Settings > Premium features.

3. Under Semantic ranker, select Select plan in the Free card.

   

REST

Use Services - Create or Update (Search Management REST API) to set semanticSearch to free:

PATCH https://management.azure.com/subscriptions/{{subscriptionId}}/resourcegroups/{{resource-group}}/providers/Microsoft.Search/searchServices/{{search-service-name}}?api-version=2026-03-01-preview
Content-Type: application/json
Authorization: Bearer {{token}}

{
  "properties": {
    "semanticSearch": "free"
  }
}

Management REST API calls are authenticated through Microsoft Entra ID. For instructions on how to authenticate, see Manage your Azure AI Search service with REST APIs.

Note

The disabled value is no longer valid in Search Management REST API version 2026-03-01-preview and later. Existing services with semanticSearch set to disabled are automatically treated as free.

Next step

Configure semantic ranker