When was Gemini 3 Flash Preview released?

Google released Gemini 3 Flash Preview on 17 Dec 2025. It is available through the Opper gateway.

Does Gemini 3 Flash Preview support zero data retention?

With abuse monitoring, yes. On Google Cloud through the Opper gateway, prompts and outputs are not used for training and are kept only for abuse monitoring.

Where is Gemini 3 Flash Preview hosted?

Gemini 3 Flash Preview runs on US hosting routes through the Opper gateway.

Is Gemini 3 Flash Preview trained on prompts and outputs?

No. Every hosting route for Gemini 3 Flash Preview is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for Gemini 3 Flash Preview?

Yes. A GDPR Data Processing Agreement is available on at least one route serving Gemini 3 Flash Preview. Contact hello@opper.ai to receive it.

Gemini 3 Flash Preview

by Google

Released 27 days after Gemini 3 Pro Image Preview · Announcement · All Google releases

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.

Call Gemini 3 Flash Preview on Opper with the OpenAI SDK. Sign up without a credit card. Get started

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Key info

Input

Output

Features

Context window

Max output

66K

Input price

$0.50 /1M$0.05 cache read

Output price

$3.00 /1M

Released

17 Dec 2025

US residency available
Zero data retention with abuse monitoring
No training by default
GDPR DPA available

Available routes

Gemini 3 Flash Preview runs on 2 different routes through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below.

Provider	Region	Zero data retention	Training	Input	Output	Cache read
Google Cloud	US		No	$0.50	$3.00	$0.05
Google Cloud	Multi		No	$0.50	$3.00	$0.05

Uptime and availability

Gemini 3 Flash Preview runs on a single route through the Opper gateway today, so its availability is that provider's availability.

99.40%route uptime, last 30 days

Single route, no failover target within this model.

Name a second model in the same request and the gateway tries it on retriable errors, so a busy hour never has to reach your users. Set up a fallback chain.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. See uptime for every provider Opper monitors.

Data handling per route

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.

Google Cloud — United States🇺🇸

Zero data retention with abuse monitoring: prompts and outputs are kept for abuse monitoring only, for a window the provider does not state, and are not used for training. No training on customer data. US; SCCs; DPA available.

Zero data retention: With abuse monitoring, window not stated.
Training: No training on customer data.
Logging: Abuse monitoring
Abuse monitoring: On by default, holds flagged content, 55 days, a person can view samples
GDPR DPA: DPA available
Transfer mechanism: SCCs

Google Cloud — Multi-region

Zero data retention: With abuse monitoring, window not stated.
Training: No training on customer data.
Logging: Abuse monitoring
Abuse monitoring: On by default, holds flagged content, 90 days, a person can view samples
GDPR DPA: DPA available
Transfer mechanism: SCCs

Get started

Call Gemini 3 Flash Preview through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

Gemini 3 Flash Preview is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: process.env.OPPER_API_KEY,
5  baseURL: "https://api.opper.ai/v3/compat",
6});
7
8const completion = await client.chat.completions.create({
9  model: "gemini-3-flash-preview",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);