litellm — A Python SDK and Proxy Server for Unified Access to Multiple LLM APIs

Overview

litellm is a Python SDK and Proxy Server (LLM Gateway) that enables developers to call over 100 different LLM APIs using the OpenAI format. It simplifies the process of interacting with various AI platforms by providing a consistent interface and output format. This project stands out for its extensive support for multiple providers and its ability to manage complex routing and fallback logic across different deployments.

Key Features

Unified access to multiple LLM APIs with a consistent output format
Automatic retry and fallback logic across different deployments
Budget and rate limit management per project and API key
Supports a wide range of providers including Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic, Sagemaker, HuggingFace, Replicate, and Groq

Use Cases

Developers needing a single interface to interact with various LLM APIs
Enterprises looking to manage and throttle API usage across different AI platforms
Researchers and data scientists who require a consistent output format for model comparisons

Advantages

Reduces complexity by abstracting away the differences between various LLM APIs
Enhances reliability with built-in retry and fallback mechanisms
Provides flexibility in managing budgets and rate limits for different projects and models

Limitations / Considerations

Requires knowledge of Python and the OpenAI API format for effective use
The project's effectiveness is dependent on the continued support and updates for the supported LLM APIs
As an open-source project, it relies on community contributions for maintenance and feature expansion

OpenAI API: The official API from OpenAI, which litellm emulates for consistency across different platforms.
HuggingFace Transformers: A library of pre-trained models similar to LLMs, though it focuses more on NLP tasks rather than providing a unified API access.
LangChain: Another project aiming to provide a unified interface for LLMs, with a focus on chain-of-thought reasoning.

Basic Information

GitHub: https://github.com/BerriAI/litellm
Stars: 28,357
License: Unknown
Last Commit: 2025-09-04

📊 Project Information

Project Name: litellm
GitHub URL: https://github.com/BerriAI/litellm
Programming Language: Python
⭐ Stars: 28,357
🍴 Forks: 4,015
📅 Created: 2023-07-27
🔄 Last Updated: 2025-09-04

🏷️ Project Topics

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📚 Documentation

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litellm

Project Description