# Google put managed agents and Gemini 3.5 Flash into the API story

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Image alt: Google put managed agents and Gemini 3.5 Flash into the API story
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Language: en
Published: 2026-05-19
Updated: 2026-09-07
Category: builder-brief
Description: Google announced Gemini 3.5 Flash, managed agents in the Gemini API and Antigravity updates for agent-first development.
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## What happened
At Google I/O, Google announced Gemini 3.5 Flash, managed agents in the Gemini API, and new Antigravity and AI Studio capabilities.

## Why it matters
Managed execution environments can remove infrastructure work, but they move reliability, observability and vendor constraints into your architecture decision.

## For builders
Start with a narrow agent job and explicit limits: allowed tools, maximum steps, timeout, spend cap and a reviewable final artifact.

## Try this
Prototype one isolated API workflow before moving a full product loop onto managed agents.

## Source
[Google: I/O 2026 developer highlights](https://blog.google/innovation-and-ai/technology/developers-tools/google-io-2026-developer-highlights/)