Gemini 3.5 Flash for Agentic Coding: A Claude Coder's Guide

This article was originally published on avinashsangle.com. Gemini 3.5 Flash is Google's new Flash-tier coding model, generally available since May 19, 2026. It scores 76.2% on Terminal-Bench 2.1 and 83.6% on MCP Atlas, beating Gemini 3.1 Pro on 11 of 15 benchmarks. Pricing is $1.50 input and $9 output per 1M tokens. For Claude Code users, it's the right model for tool-heavy agent loops, not a replacement for production code edits. TL;DR What it is: Gemini 3.5 Flash (GA May 19, 2...