Google's Agent Development Kit, built around Gemini and Vertex AI. Built by Google.
Others in vendor sdk
Common questions
Is Google ADK free to use?
Google ADK is open source and free to run yourself. You still pay whichever model provider you point it at, and this tutorial is free with no signup.
Do I need to know Python to use Google ADK?
Basic Python is enough. Functions, dictionaries and imports cover most of what Google ADK asks of you.
When should I not use Google ADK?
When something else in vendor sdk fits the job better. The others in that group are listed below.
Lessons for Google ADK are being written. Meanwhile the Claude Code tutorial covers the same ground: state, tools, loops, memory and human approval. Most of it carries straight over.
Start the Claude Code tutorial →