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Embedding Models

Quick Start

from litellm import embedding
import os
os.environ['OPENAI_API_KEY'] = ""
response = embedding(model='text-embedding-ada-002', input=["good morning from litellm"])

Proxy Usage

NOTE For vertex_ai,

export GOOGLE_APPLICATION_CREDENTIALS="absolute/path/to/service_account.json"

Add model to config

model_list:
- model_name: textembedding-gecko
litellm_params:
model: vertex_ai/textembedding-gecko

general_settings:
master_key: sk-1234

Start proxy

litellm --config /path/to/config.yaml 

# RUNNING on http://0.0.0.0:4000

Test

curl --location 'http://0.0.0.0:4000/embeddings' \
--header 'Authorization: Bearer sk-1234' \
--header 'Content-Type: application/json' \
--data '{"input": ["Academia.edu uses"], "model": "textembedding-gecko", "encoding_format": "base64"}'

Input Params for litellm.embedding()

Required Fields

  • model: string - ID of the model to use. model='text-embedding-ada-002'

  • input: string or array - Input text to embed, encoded as a string or array of tokens. To embed multiple inputs in a single request, pass an array of strings or array of token arrays. The input must not exceed the max input tokens for the model (8192 tokens for text-embedding-ada-002), cannot be an empty string, and any array must be 2048 dimensions or less.

input=["good morning from litellm"]

Optional LiteLLM Fields

  • user: string (optional) A unique identifier representing your end-user,

  • dimensions: integer (Optional) The number of dimensions the resulting output embeddings should have. Only supported in OpenAI/Azure text-embedding-3 and later models.

  • encoding_format: string (Optional) The format to return the embeddings in. Can be either "float" or "base64". Defaults to encoding_format="float"

  • timeout: integer (Optional) - The maximum time, in seconds, to wait for the API to respond. Defaults to 600 seconds (10 minutes).

  • api_base: string (optional) - The api endpoint you want to call the model with

  • api_version: string (optional) - (Azure-specific) the api version for the call

  • api_key: string (optional) - The API key to authenticate and authorize requests. If not provided, the default API key is used.

  • api_type: string (optional) - The type of API to use.

Output from litellm.embedding()

{
"object": "list",
"data": [
{
"object": "embedding",
"index": 0,
"embedding": [
-0.0022326677571982145,
0.010749882087111473,
...
...
...

]
}
],
"model": "text-embedding-ada-002-v2",
"usage": {
"prompt_tokens": 10,
"total_tokens": 10
}
}

OpenAI Embedding Models

Usage

from litellm import embedding
import os
os.environ['OPENAI_API_KEY'] = ""
response = embedding(
model="text-embedding-3-small",
input=["good morning from litellm", "this is another item"],
metadata={"anything": "good day"},
dimensions=5 # Only supported in text-embedding-3 and later models.
)
Model NameFunction CallRequired OS Variables
text-embedding-3-smallembedding('text-embedding-3-small', input)os.environ['OPENAI_API_KEY']
text-embedding-3-largeembedding('text-embedding-3-large', input)os.environ['OPENAI_API_KEY']
text-embedding-ada-002embedding('text-embedding-ada-002', input)os.environ['OPENAI_API_KEY']

Azure OpenAI Embedding Models

API keys

This can be set as env variables or passed as params to litellm.embedding()

import os
os.environ['AZURE_API_KEY'] =
os.environ['AZURE_API_BASE'] =
os.environ['AZURE_API_VERSION'] =

Usage

from litellm import embedding
response = embedding(
model="azure/<your deployment name>",
input=["good morning from litellm"],
api_key=api_key,
api_base=api_base,
api_version=api_version,
)
print(response)
Model NameFunction Call
text-embedding-ada-002embedding(model="azure/<your deployment name>", input=input)

h/t to Mikko for this integration

OpenAI Compatible Embedding Models

Use this for calling /embedding endpoints on OpenAI Compatible Servers, example https://github.com/xorbitsai/inference

Note add openai/ prefix to model so litellm knows to route to OpenAI

Usage

from litellm import embedding
response = embedding(
model = "openai/<your-llm-name>", # add `openai/` prefix to model so litellm knows to route to OpenAI
api_base="http://0.0.0.0:4000/" # set API Base of your Custom OpenAI Endpoint
input=["good morning from litellm"]
)

Bedrock Embedding

API keys

This can be set as env variables or passed as params to litellm.embedding()

import os
os.environ["AWS_ACCESS_KEY_ID"] = "" # Access key
os.environ["AWS_SECRET_ACCESS_KEY"] = "" # Secret access key
os.environ["AWS_REGION_NAME"] = "" # us-east-1, us-east-2, us-west-1, us-west-2

Usage

from litellm import embedding
response = embedding(
model="amazon.titan-embed-text-v1",
input=["good morning from litellm"],
)
print(response)
Model NameFunction Call
Titan Embeddings - G1embedding(model="amazon.titan-embed-text-v1", input=input)
Cohere Embeddings - Englishembedding(model="cohere.embed-english-v3", input=input)
Cohere Embeddings - Multilingualembedding(model="cohere.embed-multilingual-v3", input=input)

Cohere Embedding Models

https://docs.cohere.com/reference/embed

Usage

from litellm import embedding
os.environ["COHERE_API_KEY"] = "cohere key"

# cohere call
response = embedding(
model="embed-english-v3.0",
input=["good morning from litellm", "this is another item"],
input_type="search_document" # optional param for v3 llms
)
Model NameFunction Call
embed-english-v3.0embedding(model="embed-english-v3.0", input=["good morning from litellm", "this is another item"])
embed-english-light-v3.0embedding(model="embed-english-light-v3.0", input=["good morning from litellm", "this is another item"])
embed-multilingual-v3.0embedding(model="embed-multilingual-v3.0", input=["good morning from litellm", "this is another item"])
embed-multilingual-light-v3.0embedding(model="embed-multilingual-light-v3.0", input=["good morning from litellm", "this is another item"])
embed-english-v2.0embedding(model="embed-english-v2.0", input=["good morning from litellm", "this is another item"])
embed-english-light-v2.0embedding(model="embed-english-light-v2.0", input=["good morning from litellm", "this is another item"])
embed-multilingual-v2.0embedding(model="embed-multilingual-v2.0", input=["good morning from litellm", "this is another item"])

HuggingFace Embedding Models

LiteLLM supports all Feature-Extraction Embedding models: https://huggingface.co/models?pipeline_tag=feature-extraction

Usage

from litellm import embedding
import os
os.environ['HUGGINGFACE_API_KEY'] = ""
response = embedding(
model='huggingface/microsoft/codebert-base',
input=["good morning from litellm"]
)

Usage - Custom API Base

from litellm import embedding
import os
os.environ['HUGGINGFACE_API_KEY'] = ""
response = embedding(
model='huggingface/microsoft/codebert-base',
input=["good morning from litellm"],
api_base = "https://p69xlsj6rpno5drq.us-east-1.aws.endpoints.huggingface.cloud"
)
Model NameFunction CallRequired OS Variables
microsoft/codebert-baseembedding('huggingface/microsoft/codebert-base', input=input)os.environ['HUGGINGFACE_API_KEY']
BAAI/bge-large-zhembedding('huggingface/BAAI/bge-large-zh', input=input)os.environ['HUGGINGFACE_API_KEY']
any-hf-embedding-modelembedding('huggingface/hf-embedding-model', input=input)os.environ['HUGGINGFACE_API_KEY']

Mistral AI Embedding Models

All models listed here https://docs.mistral.ai/platform/endpoints are supported

Usage

from litellm import embedding
import os

os.environ['MISTRAL_API_KEY'] = ""
response = embedding(
model="mistral/mistral-embed",
input=["good morning from litellm"],
)
print(response)
Model NameFunction Call
mistral-embedembedding(model="mistral/mistral-embed", input)

Vertex AI Embedding Models

Usage - Embedding

import litellm
from litellm import embedding
litellm.vertex_project = "hardy-device-38811" # Your Project ID
litellm.vertex_location = "us-central1" # proj location

response = embedding(
model="vertex_ai/textembedding-gecko",
input=["good morning from litellm"],
)
print(response)

Supported Models

All models listed here are supported

Model NameFunction Call
textembedding-geckoembedding(model="vertex_ai/textembedding-gecko", input)
textembedding-gecko-multilingualembedding(model="vertex_ai/textembedding-gecko-multilingual", input)
textembedding-gecko-multilingual@001embedding(model="vertex_ai/textembedding-gecko-multilingual@001", input)
textembedding-gecko@001embedding(model="vertex_ai/textembedding-gecko@001", input)
textembedding-gecko@003embedding(model="vertex_ai/textembedding-gecko@003", input)
text-embedding-preview-0409embedding(model="vertex_ai/text-embedding-preview-0409", input)
text-multilingual-embedding-preview-0409embedding(model="vertex_ai/text-multilingual-embedding-preview-0409", input)

Voyage AI Embedding Models

Usage - Embedding

from litellm import embedding
import os

os.environ['VOYAGE_API_KEY'] = ""
response = embedding(
model="voyage/voyage-01",
input=["good morning from litellm"],
)
print(response)

Supported Models

All models listed here https://docs.voyageai.com/embeddings/#models-and-specifics are supported

Model NameFunction Call
voyage-01embedding(model="voyage/voyage-01", input)
voyage-lite-01embedding(model="voyage/voyage-lite-01", input)
voyage-lite-01-instructembedding(model="voyage/voyage-lite-01-instruct", input)