> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# CreateEmbeddingsRequest

Embeddings request input

## Fields

| Field            | Type                                                                                                                  | Required             | Description                                                                                                                                                                                                                                                                                                             | Example                                                                        |
| ---------------- | --------------------------------------------------------------------------------------------------------------------- | -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------ |
| `Dimensions`     | `*int64`                                                                                                              | :heavy\_minus\_sign: | The number of dimensions for the output embeddings                                                                                                                                                                                                                                                                      | 1536                                                                           |
| `EncodingFormat` | [\*operations.EncodingFormat](../../models/operations/encodingformat.mdx)                                             | :heavy\_minus\_sign: | The format of the output embeddings                                                                                                                                                                                                                                                                                     | float                                                                          |
| `Input`          | [operations.InputUnion](../../models/operations/inputunion.mdx)                                                       | :heavy\_check\_mark: | Text, token, or multimodal input(s) to embed                                                                                                                                                                                                                                                                            | The quick brown fox jumps over the lazy dog                                    |
| `InputType`      | `*string`                                                                                                             | :heavy\_minus\_sign: | The type of input (e.g. search\_query, search\_document)                                                                                                                                                                                                                                                                | search\_query                                                                  |
| `Model`          | `string`                                                                                                              | :heavy\_check\_mark: | The model to use for embeddings                                                                                                                                                                                                                                                                                         | openai/text-embedding-3-small                                                  |
| `Provider`       | optionalnullable.OptionalNullable\[[components.ProviderPreferences](../../models/components/providerpreferences.mdx)] | :heavy\_minus\_sign: | N/A                                                                                                                                                                                                                                                                                                                     | \{<br />"allow\_fallbacks": true<br />}                                        |
| `SessionID`      | `*string`                                                                                                             | :heavy\_minus\_sign: | A unique identifier for grouping related requests (e.g., a conversation or agent workflow). Used for observability grouping in Broadcast and private logging; never sent to the provider. If provided in both the request body and the x-session-id header, the body value takes precedence. Maximum of 256 characters. | session-1234                                                                   |
| `Trace`          | [\*components.TraceConfig](../../models/components/traceconfig.mdx)                                                   | :heavy\_minus\_sign: | Metadata for observability and tracing. Known keys (trace\_id, trace\_name, span\_name, generation\_name, parent\_span\_id) have special handling. Additional keys are passed through as custom metadata to configured broadcast destinations.                                                                          | \{<br />"trace\_id": "trace-abc123",<br />"trace\_name": "my-app-trace"<br />} |
| `User`           | `*string`                                                                                                             | :heavy\_minus\_sign: | A unique identifier for the end-user                                                                                                                                                                                                                                                                                    | user-1234                                                                      |