Google Agent Development Kit: open source SDK for hierarchical Gemini agents
In one sentence Google launches ADK, an open source SDK for building hierarchical multi-level agents on Gemini with structured tool calling, native state machines, and native multi-agent orchestration.
Google Agent Development Kit (ADK) is Google's official answer to the question: "how do you build complex agents with Gemini?" The SDK provides tools to create agents that can coordinate other agents in a hierarchy, use tools in a structured way, and maintain state between calls.
Unlike independent frameworks like LangChain, ADK is designed specifically for Gemini and the Google Cloud ecosystem (Vertex AI, BigQuery, Google Search). Integration is deeper and performance is optimized for these services.
ADK is open source and also supports other LLM models, but the competitive advantage is in native integration with Google infrastructure, especially for enterprise applications.
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Google ADK, Gemini, Vertex AI
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