> For the complete documentation index, see [llms.txt](https://docs.wisej.com/ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/ai/components/built-in-services/iembeddinggenerationservice.md).

# IEmbeddingGenerationService

## Overview

The [IEmbeddingGenerationService](/ai/components/api/services/iembeddinggenerationservice.md) offers a unified interface to embedding generation endpoints. It is used by all Wisej.AI components and tools that need to convert text chunks into vectors. Typically, it works in conjunction with the `IEmbeddingStorageService`.

The `DefaultEmbeddingGenerationService` implementation, as registered by Wisej.AI, utilizes the OpenAI endpoint. It accesses the [API key stored](/ai/components/api/helpers/wisej.ai.helpers.apikeys.md) in `ApiKeys.json` or the corresponding environment variable and employs the "text-embedding-3-small" model (1,536 dimensions) for generating embeddings.

See [Embedding Generation](/ai/concepts/vector-databases.md#embedding-generation) for more information on how to change the default model and provider.

## Default Implementation

The default implementation of the [`IEmbeddingGenerationService`](/ai/components/api/services/iembeddinggenerationservice.md) interface is provided by the [`DefaultEmbeddingGenerationService`](/ai/components/api/services/iembeddinggenerationservice/wisej.ai.services.defaultembeddinggenerationservice.md) class. This class employs the [`OpenAIEndpoint`](/ai/components/api/smartendpoint/wisej.ai.endpoints.openaiendpoint.md) as its standard endpoint for embedding generation. In addition to the DefaultEmbeddingGeneration service, Wisej.AI also offers the [HuggingFaceEmbeddingGenerationService](/ai/components/api/services/iembeddinggenerationservice/wisej.ai.services.huggingfaceembeddinggenerationservice.md) implementation.

For further details and to access the source code of the built-in implementations, please refer to the [Embedding Generation](/ai/concepts/vector-databases.md#embedding-generation) page.


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