PyPI May 2026: 163.8 billion downloads (+9.2% MoM).

The AI agent race is now measurable in download counts:

⚡ sglang: 304M (+744% in 3 months), @lsyincs @sgl_project - the sleeper hit 🔀 litellm: 513M (+425% in 3 months), @krrish_dh @ishaan_jaff @LiteLLM 📐 pydantic-ai-slim: 268M (+85% MoM), @samuelcolvin @pydantic 🌐 langchain-protocol: 37M (+524% in one month), @hwchase17 @LangChain 🕷️ browser-use: 24M (+132% MoM), @mamagnus00 @gregpr07 @browser_use 🤝 crewai: 14.5M (+108% MoM), @joaomdmoura @crewAIInc

boto3 still #1 at 3.3B. AWS wins the boring prize.

Full data: https://clickhou.se/43USFbm