Gemini 3.5 Flash: Combine Search, Code & Functions

On June 4, 2026 Google moved Gemini 3.5 Flash to general availability. The headline isn't a benchmark score, it's a workflow change: Flash can now run Google Search, browse a URL, execute Python, and call your own function inside a single request, and it carries the context of all those tool calls forward across turns. Google calls the mechanism tool context circulation, and it turns a fast, cheap model into a capable research agent without you stitching three separate API calls together.

Most tutorials show one tool at a time: search grounding here, function calling there. Real agents need them mixed. A research assistant has to find fresh facts on the web, do real arithmetic on the numbers it finds (LLMs are still bad at math), and then hand a clean result to your business logic. This guide builds exactly that, end to end, with code that matches the GA API.