Gemini 3.5 Flash is Google's effort to combine frontier-level intelligence with high speed, running roughly 4x faster than other frontier models while holding strong reasoning. Google reports it outperforms Gemini 3.1 Pro on demanding evaluations including coding (Terminal-Bench 2.1 at 76.2%) and agent performance (GDPval-AA at 1656 Elo), making it a fit for high-throughput agentic systems. The 1M token context window lets it process large documents, codebases, and long conversation histories. Gemini 3.5 Flash accepts text, image, audio, and video inputs and returns text, supports configurable thinking levels to trade off quality, cost, and latency, and is strong at tool use and function calling. With up to 64K output tokens, it targets applications where speed and reasoning quality both matter.
Gemini 3.5 Flash runs on 3 different routes through the Opper gateway. Compare residency, ZDR, and training posture at a glance β full data-handling detail per route below.
| Provider | Region | Zero data retention | Training | Input | Output |
|---|---|---|---|---|---|
| US | Enterprise | No | $1.50 | $9.00 | |
| US | Enterprise | No | $1.50 | $9.00 | |
| EU | Enterprise | No | $1.50 | $9.00 |
Training posture across routes: No training on prompts by default.
Each route hosting Gemini 3.5 Flash has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.
Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.
Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.
Zero data retention is available via Opper Enterprise contract. No training on customer data. EU; DPA available.
Independent benchmark scores β composite indices for reasoning, coding, and math, plus individual eval scores where available.
Call Gemini 3.5 Flash through the Opper gateway with one API key. Let your coding agent set it up, or call it directly β Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.
Copy this and paste it into your coding agent β Claude Code, Cursor, Codex, and more β and it'll wire up Opper for you.
import OpenAI from "openai";const client = new OpenAI({apiKey: process.env.OPPER_API_KEY,baseURL: "https://api.opper.click/v3/compat",});const completion = await client.chat.completions.create({model: "gemini/gemini-3.5-flash",messages: [{ role: "user", content: "Hello" }],});console.log(completion.choices[0].message.content);
Side-by-side on privacy, EU hosting, pricing, and benchmarks.
