When was Gemini 3.1 Pro Preview released?

Google released Gemini 3.1 Pro Preview on 19 Feb 2026. It is available through the Opper gateway.

Does Gemini 3.1 Pro 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. Zero data retention, with no monitoring hold, is available on Google Cloud under a signed Enterprise agreement.

Where is Gemini 3.1 Pro Preview hosted?

Gemini 3.1 Pro Preview runs on US hosting routes through the Opper gateway.

Is Gemini 3.1 Pro Preview trained on prompts and outputs?

No. Every hosting route for Gemini 3.1 Pro Preview is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for Gemini 3.1 Pro Preview?

Yes. A GDPR Data Processing Agreement is available on at least one route serving Gemini 3.1 Pro Preview. Contact hello@opper.ai to receive it.

Gemini 3.1 Pro Preview

by Google

Released 64 days after Gemini 3 Flash Preview · All Google releases

Gemini 3.1 Pro is Google's most advanced reasoning model, built for complex problem-solving across mathematics, STEM, and software engineering. Launched in February 2026, it outperforms its predecessor Gemini 3 Pro across reasoning and multimodal benchmarks, scoring 77.1% on ARC-AGI-2 abstract reasoning and 80.6% on SWE-Bench Verified for real-world coding. With a 1M-token context window and multimodal inputs spanning text, audio, images, video, and entire code repositories, it analyzes large codebases, scientific papers, and heterogeneous datasets in a single request. The model supports an extended thinking mode, function calling, structured outputs, and code execution, enabling sophisticated agentic workflows and research applications. Versus Gemini 2.5 Pro, this generation delivers substantially better agentic performance and reasoning depth. For straightforward, cost-sensitive tasks, Gemini 3.1 Flash Lite is more economical, but Gemini 3.1 Pro remains the top choice for frontier-level reasoning and coding.

Call Gemini 3.1 Pro 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

$2.00 /1M$0.20 cache read

Output price

$12.00 /1M

Released

19 Feb 2026

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

Available routes

Gemini 3.1 Pro Preview runs on 3 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. Zero data retention on Google Cloud is available on Enterprise.

Provider	Region	Training	Input	Output	Cache read
Google Cloud	US	No	$2.00	$12.00	$0.20
Google Cloud	Multi	No	$2.00	$12.00	$0.20
Google Cloud	Multi	No	$2.00	$12.00	$0.20

Uptime and availability

Gemini 3.1 Pro 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 3.1 Pro 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: nothing is logged, held for abuse monitoring or used for training. Available under a signed Enterprise agreement. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: Yes, on Enterprise. Nothing is logged, held for abuse monitoring or used for training.
Plan: Signed Enterprise agreement
Training: No training on customer data.
Logging: None
Abuse monitoring: On by default, keeps nothing
Caching: Content cached for replay
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

Benchmarks

Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.

Global rank#101 of 665 LLMs

TierEfficient

Output speed135 tok/s

First token18.48s

Intelligence Index29.7

Coding Index68.8

Reasoning & knowledge

GPQA Diamond

94%

Humanity's Last Exam

47%

Long-context reasoning

82%

Coding

SciCode

59%

Agentic & tool use

Terminal-Bench Hard

54%

τ²-Bench Telecom

96%

Math & instruction following

IFBench

77%

See full leaderboard →Benchmarks via Artificial Analysis · View on AA

Get started

Call Gemini 3.1 Pro Preview through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

Gemini 3.1 Pro 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-3.1-pro-preview",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);