Google ADK 2.0 Is Stable — Why That Makes the OpenAI Split Matter More

Short summary

Google shipped ADK 2.0 stable with A2A protocol for multi-agent coordination this week, while OpenAI rejected that pull request and chose single-agent Sandbox capabilities instead—revealing fundamentally different architectural bets. Product leaders must decide: choose ADK+A2A for specialized agents that delegate work, OpenAI for high-autonomy single agents, or LangGraph/Semantic Kernel for hybrid flexibility. Framework choice now locks your system architecture for years.

• •ADK 2.0 stable + A2A protocol enables production multi-agent coordination and discovery
• •OpenAI prioritizes single-agent autonomy (Sandbox Agents) over interop protocols
• •Framework selection determines architectural ceiling: multi-agent vs single-agent vs hybrid

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