litellm/docs/my-website/docs/rerank.md

/rerank

:::tip

LiteLLM Follows the cohere api request / response for the rerank api

:::

Overview

Feature	Supported	Notes
Cost Tracking	✅	Works with all supported models
Logging	✅	Works across all integrations
End-user Tracking	✅
Fallbacks	✅	Works between supported models
Loadbalancing	✅	Works between supported models
Guardrails	✅	Applies to input query only (not documents)
Supported Providers	Cohere, Together AI, Azure AI, DeepInfra, Nvidia NIM, Infinity, Fireworks AI, Voyage AI, watsonx.ai

LiteLLM Python SDK Usage

Quick Start

from litellm import rerank
import os

os.environ["COHERE_API_KEY"] = "sk-.."

query = "What is the capital of the United States?"
documents = [
    "Carson City is the capital city of the American state of Nevada.",
    "The Commonwealth of the Northern Mariana Islands is a group of islands in the Pacific Ocean. Its capital is Saipan.",
    "Washington, D.C. is the capital of the United States.",
    "Capital punishment has existed in the United States since before it was a country.",
]

response = rerank(
    model="cohere/rerank-english-v3.0",
    query=query,
    documents=documents,
    top_n=3,
)
print(response)

Async Usage

from litellm import arerank
import os, asyncio

os.environ["COHERE_API_KEY"] = "sk-.."

async def test_async_rerank(): 
    query = "What is the capital of the United States?"
    documents = [
        "Carson City is the capital city of the American state of Nevada.",
        "The Commonwealth of the Northern Mariana Islands is a group of islands in the Pacific Ocean. Its capital is Saipan.",
        "Washington, D.C. is the capital of the United States.",
        "Capital punishment has existed in the United States since before it was a country.",
    ]

    response = await arerank(
        model="cohere/rerank-english-v3.0",
        query=query,
        documents=documents,
        top_n=3,
    )
    print(response)

asyncio.run(test_async_rerank())

LiteLLM Proxy Usage

LiteLLM provides an cohere api compatible /rerank endpoint for Rerank calls.

Setup

Add this to your litellm proxy config.yaml

model_list:
  - model_name: Salesforce/Llama-Rank-V1
    litellm_params:
      model: together_ai/Salesforce/Llama-Rank-V1
      api_key: os.environ/TOGETHERAI_API_KEY
  - model_name: rerank-english-v3.0
    litellm_params:
      model: cohere/rerank-english-v3.0
      api_key: os.environ/COHERE_API_KEY

Start litellm

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

# RUNNING on http://0.0.0.0:4000

Test request

curl http://0.0.0.0:4000/rerank \
  -H "Authorization: Bearer sk-1234" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "rerank-english-v3.0",
    "query": "What is the capital of the United States?",
    "documents": [
        "Carson City is the capital city of the American state of Nevada.",
        "The Commonwealth of the Northern Mariana Islands is a group of islands in the Pacific Ocean. Its capital is Saipan.",
        "Washington, D.C. is the capital of the United States.",
        "Capital punishment has existed in the United States since before it was a country."
    ],
    "top_n": 3
  }'

Supported Providers

⚡️See all supported models and providers at models.litellm.ai

Provider	Link to Usage
Cohere (v1 + v2 clients)	Usage
Together AI	Usage
Azure AI	Usage
Jina AI	Usage
AWS Bedrock	Usage
HuggingFace	Usage
Infinity	Usage
vLLM	Usage
DeepInfra	Usage
Vertex AI	Usage
Fireworks AI	Usage
Voyage AI	Usage
IBM watsonx.ai	Usage