Gemini 3 Flash Preview is a high-speed, reasoning-optimized model built for agentic workflows, multi-turn conversations, and coding assistance. It reaches near Pro-level performance on PhD-level benchmarks such as GPQA Diamond (90.4%) and Humanity's Last Exam (33.7% without tools) while keeping latency well below larger Gemini variants. With a 1M token context window and up to 65K output tokens, it accepts multimodal inputs including text, images, audio, video, and PDFs, returning text. The model offers configurable thinking levels (minimal, low, medium, high) for fine cost-performance tuning, structured output support, and context caching. It suits interactive development, long-running agent loops, and collaborative coding where both reasoning quality and response speed are critical.
Gemini 3 Flash Preview runs on 2 different routes through the Opper gateway. Compare residency, ZDR, and training posture at a glance — full data-handling detail per route below.
| Provider | Region | Zero data retention | Training | Input | Output |
|---|---|---|---|---|---|
| Gemini | US | Enterprise | No | $0.50 | $3.00 |
| Google Cloud | US | Enterprise | No | $0.50 | $3.00 |
Training posture across routes: No training on prompts by default.
Each route hosting Gemini 3 Flash Preview 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.
Call Gemini 3 Flash Preview through the Opper gateway with one API key. Let your coding agent set it up, or call it directly — Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.
Copy this and paste it into your coding agent — Claude Code, Cursor, Codex, and more — 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.ai/v3/compat",});const completion = await client.chat.completions.create({model: "gemini/gemini-3-flash-preview",messages: [{ role: "user", content: "Hello" }],});console.log(completion.choices[0].message.content);
Side-by-side on privacy, EU hosting, pricing, and benchmarks.
