Key features

• Unified Python library and gateway for calling 100+ LLM APIs, including OpenAI, Anthropic, and Azure.
• Built-in authentication for gateway access control.
• Load balancing across multiple LLM providers and models.
• Spend tracking to monitor API usage and costs.
• Lightweight and open-source, designed as a single interface for LLM API calls.

Platforms: Windows, macOS, Linux

Links

Official website: https://www.litellm.ai
Source code: https://github.com/BerriAI/litellm

Pricing

Free. The core is open-source under the MIT License, offering a complete LLM gateway with unified API, authentication, load balancing, and spend tracking at no cost.