Google makes Interactions API the default way to build with Gemini agents

Short summary

Google released Interactions API as the primary way to build Gemini agents, offering managed agents, background execution, and Flex tier cost reduction (50% cheaper). generateContent API stays supported but won't receive frontier agent features first. New projects should use Interactions; existing apps should audit workflows for migration benefits.

• •Interactions API now the default for new Gemini development after GA release
• •Includes managed agents, background execution, tool mixing, and 50% cost reduction via Flex tier
• •Legacy generateContent API supported but frontier agent capabilities arriving on Interactions API first; audit for migration opportunities

Generated with AI, which can make mistakes.