Because I solved it to be…..

Trust the process by testing the merit.

Test the merit by trusting the process

The Interactions API has emerged as the primary, unified interface for interacting with Gemini models and specialized agents. As of June 2026, it is generally available and represents the recommended standard for building generative AI applications. It simplifies the development process by offloading complex context and state management to the server.

Core Capabilities

The Interactions API is designed to handle the requirements of modern agentic applications:

• Unified Endpoint: A single interface for both base models (like Gemini) and specialized agents (such as the Gemini Deep Research agent).
• Server-Side State Management: You no longer need to manually manage conversation history client-side. By using the previous_interaction_id, the server retrieves the history, reducing context management errors and potentially improving cache hit rates.
• Background Execution: Enables offloading long-running inference tasks to the server, allowing the client to maintain responsiveness without keeping long-lived connections open.
• Multimodal Native: Designed to natively handle and generate text, images, audio, video, and documents.
• Interleaved Logic: Supports complex agentic flows, including reasoning traces, tool calls, and their respective outputs within a structured, interpretable history.