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Azure OpenAI vectorizer

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Important

This feature is in public preview under Supplemental Terms of Use. The 2023-10-01-Preview REST API and all newer preview REST APIs support this feature.

The Azure OpenAI vectorizer connects to a deployed embedding model on your Azure OpenAI resource to generate embeddings at query time. Your data is processed in the Geo where your model is deployed.

Note

This vectorizer is bound to Azure OpenAI and is charged at the existing Azure OpenAI pay-as-you go price.

Vectorizer parameters

Parameters are case-sensitive.

Parameter name Description
resourceUri The URI of a model provider, such as an Azure OpenAI resource or an OpenAI URL.
apiKey The secret key used to access the model. If you provide a key, leave authIdentity empty. If you set both the apiKey and authIdentity, the apiKey is used on the connection.
deploymentId The name of the deployed Azure OpenAI embedding model. The model should be an embedding model, such as text-embedding-ada-002. See the List of Azure OpenAI models for supported models.
authIdentity A user-managed identity used by the search service for connecting to Azure OpenAI. You can use either a system or user managed identity. To use a system manged identity, leave apiKey and authIdentity blank. The system-managed identity is used automatically. A managed identity must have Cognitive Services OpenAI User permissions to send text to Azure OpenAI.
modelName (Required in API version 2024-05-01-Preview and later). The name of the Azure OpenAI embedding model that is deployed at the provided resourceUri and deploymentId. Currently supported values are text-embedding-ada-002, text-embedding-3-large, and text-embedding-3-small

Supported vector query types

The Azure OpenAI vectorizer only supports text vector queries.

Expected field dimensions

The expected field dimensions for a field configured with an Azure OpenAI vectorizer depend on the modelName that is configured.

modelName Minimum dimensions Maximum dimensions
text-embedding-ada-002 1536 1536
text-embedding-3-large 1 3072
text-embedding-3-small 1 1536

Sample definition

"vectorizers": [
    {
        "name": "my-openai-vectorizer",
        "kind": "azureOpenAI",
        "azureOpenAIParameters": {
            "resourceUri": "https://my-fake-azure-openai-resource.openai.azure.com",
            "apiKey": "0000000000000000000000000000000000000",
            "deploymentId": "my-ada-002-deployment",
            "authIdentity": null,
            "modelName": "text-embedding-ada-002",
        },
    }
]

See also