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Simplify LLM Integration with litellm

Unify 100+ LLM APIs with litellm, a Python SDK and proxy server. Ideal for founders needing streamlined AI gateway solutions.
intermediateโฑ 1-2 hours๐Ÿ’ต Free (self-hosted)
57,286 stars10,903 forksPythonHealth Score 9/10Updated 8/26/2026100% free ยท open source
What it is

Makes it easy to call 100+ LLM APIs in OpenAI format from Python, with cost tracking, and more

What you can make with it

Automations like: when a new customer signs up, use an LLM to generate a personalized onboarding email in Notion.

How it helps

Saves development time when using multiple LLM APIs, and helps track costs associated with using these APIs.

Real use case example

"A solo developer building a customer support chatbot can use litellm to easily integrate with multiple LLM APIs, like OpenAI and Anthropic, to create more accurate and personalized responses. To do this, they simply install the Python SDK, set up their APIs, and write a simple script to call the LLMs for every new chat."

If you're new

Pick this up once you're familiar with Python and basic AI concepts.

If you're senior

Senior engineers use litellm when building large-scale chatbots, or other applications that require integrating multiple LLM APIs.

Common confusion cleared up

Don't assume litellm is just another OpenAI wrapper - it supports many other LLM APIs and has features like cost tracking.

Best inside these AI tools
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Pairs with
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Why we list it on WorkflowStacks: Free and open-source, allowing users to save cost and easily integrate with their own apps.
What it does

Litellm is a Python SDK and proxy server that simplifies calling over 100 LLM APIs from various providers, including OpenAI, Azure, and Google Vertex AI, with features like cost tracking, guardrails, load balancing, and logging.

Install / run
pip install litellm
When to use it
  • โ€ขWhen you need to integrate multiple LLM APIs into your application and want to manage them through a single interface
  • โ€ขWhen you want to track and control costs associated with LLM API calls across different providers
  • โ€ขWhen you need to implement guardrails and load balancing to ensure reliable and efficient LLM API usage
Quick start
  1. 1Clone the Litellm GitHub repository using `git clone https://github.com/BerriAI/litellm.git`
  2. 2Create a configuration file `config.yaml` to specify your LLM API credentials and settings, as shown in the example `config.example.yaml` file
  3. 3Run the Litellm proxy server using `litellm serve --config config.yaml`
  4. 4Use the Litellm Python SDK to call LLM APIs, such as `from litellm import Client; client = Client('openai'); response = client.complete(prompt='Hello, world!')`
  5. 5Verify the cost tracking and logging features by checking the `logs` directory and the `costs` table in the database
Ready-to-paste prompt
from litellm import Client; client = Client('openai'); response = client.complete(prompt='Write a short story about a character who discovers a hidden world.', max_tokens=512)
Heads up: You need to replace the placeholder API keys and credentials in the `config.example.yaml` file with your actual credentials from the LLM providers, such as OpenAI, Azure, or Google Vertex AI, to use Litellm successfully
Saves to your device

Topics

ai-gateway
anthropic
azure-openai
bedrock
gateway
langchain
litellm
llm
llm-gateway
llmops
mcp-gateway
openai
openai-proxy
rust
rust-ai
vertex-ai
How Simplify LLM Integration with litellm works
Codeflow
Free to inspect

Simplify LLM Integration with litellm is a very large project (~1M lines across 4635 code files, plus 2870 test files). Setup is light: installs like a normal app โ€” add your API keys. Reading the code is optional. Last commit this month, Other license, has a test suite.

Size
Very large codebase
~1M lines ยท 4635 code files ยท days to read โ€” use, don't read
Setup
One-command install
Installs like a normal app โ€” add your API keys. Reading the code is optional.
Runs on
Node.js ยท Python ยท Docker
Needs API keys (.env)
Where to start reading
  1. 1
    README.md
    Start here โ€” what it does and how to install it
  2. 2
    AGENTS.md
    The instructions the AI actually follows
  3. 3
    litellm/main.py
    Where the program starts running
  4. 4
    package.json
    Dependencies and the commands it exposes
  5. 5
    .env.example
    The API keys and settings you must provide
What's in each folder
litellm/Core code โ€” the actual logic2444 files
ui/Frontend / UI1989 files
backend/Backend / API4 files
cookbook/Examples you can copy119 files
examples/Examples you can copy1 files
litellm-proxy-extras/Folder167 files
enterprise/Folder157 files
litellm-rust/Folder138 files
READMEHas testsDocumentedCI checksDocker readyExamples includedOther licenseUpdated this month
Quick Actions
Details
Creator
BerriAI
Language
Python
Category
claude-skill
Published
7/27/2023

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