Wednesday, June 3, 2026

What is LiteLLM?

 


LiteLLM is an open-source AI gateway and Python SDK that allows you to call over 100 Large Language Model (LLM) APIs using a single, unified interface. It translates your requests into the specific formats required by various providers like OpenAI, Anthropic, Google Gemini, Azure, and AWS Bedrock.Key FeaturesDrop-in OpenAI Compatibility: You can swap LLM providers without rewriting your code; any model can be treated as if it were a standard OpenAI object.Spend Tracking: Accurately track API costs by key, user, team, or organization.Model Fallbacks: Set up rules so that if a primary model fails or is rate-limited, your application automatically routes requests to a backup model.Enterprise Security: Provides features like virtual API keys, rate-limiting, edge-level guardrails, and access control.Observability: Easily log your inputs and outputs to tools like Langfuse, Helicone, Lunary, and MLflow.How You Can Use ItPython SDK: Integrate it directly into your Python codebase for seamless, local script-based multi-model support.Proxy Server (AI Gateway): Deploy it as a standalone server to create a centralized API gateway for your entire organization, making it easy to manage users and budgets.For a quick beginner introduction to how LiteLLM standardizes the code for various models and providers:

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