Embeddings API

FastRouter.ai supports a unified Embeddings API to generate high-quality vector representations for your text using supported model providers like OpenAI.

Supported Models

Model Slug	Description
openai/text-embedding-3-small	Fast and lightweight embedding model
openai/text-embedding-3-large	High-quality embeddings for nuanced tasks
openai/text-embedding-ada-002	Most cost-effective embedding model

Parameters

Field	Type	Description
model	string	The fully qualified model slug. See Supported Models above.
input	string or string[]	The input text or array of texts to embed. Maximum length depends on the model used.
dimensions	integer	Optional. The number of dimensions the resulting output embeddings should have. Only supported in text-embedding-3 and later models.

Endpoint

POST https://go.fastrouter.ai/v1/embeddings

Request Format

Send a prompt input with an optional dimensions parameter to generate embeddings.

Request Example

{
  "model": "openai/text-embedding-3-large",
  "input": "What is node JS?",
  "dimensions": 4  
}

Sample Response

{
  "object": "list",
  "data": [
    {
      "object": "embedding",
      "index": 0,
      "embedding": [0.0023, 0.0492, ..., -0.0187]
    }
  ],
  "model": "openai/text-embedding-3-large",
  "usage": {
    "prompt_tokens": 5,
    "total_tokens": 5
  }
}