Google has announced the general availability of the Gemini Interactions API, which is now the primary interface for building applications with Gemini models and AI agents.
First introduced in public beta in December 2025, the API unifies multimodal interactions, tool use, structured outputs, streaming, and state management through a consistent developer experience.
It also replaces the legacy generateContent API as the recommended interface for new projects while maintaining backward compatibility for existing applications. Google says the Interactions API simplifies agent development, reduces integration complexity, and provides a scalable foundation for production-ready conversational AI and autonomous workflows.
