Google Language New

Gemini 3.1 Pro Preview

Latest Gemini 3.1 Pro with enhanced capabilities

1M Context window

Text + Vision Modalities

General Specialty

Yes Streaming

Get API key — free View docs →

Model ID gemini-3.1-pro-preview /v1/chat/completions

Our pricing

Input tokens per 1M tok

$1.60

Output tokens per 1M tok

$9.60

Pay-as-you-go · No minimums · Cancel anytime

OpenAI-compatible ( api.belugapi.com/v1)

Start for free →

No credit card required to test

Capabilities

What Gemini 3.1 Pro Preview
can do for you.

Native API parity with the official provider — every feature surfaced one-to-one.

Streaming

Server-sent events out of the box

Vision

Analyze images, charts & documents

Reasoning

Deep chain-of-thought for hard tasks

Long context

200K+ tokens of working memory

Integration

2-line migration.
Zero friction.

BelugAPI is 100 % compatible with the OpenAI SDK. Point base_url to our endpoint and you're done — no refactoring, no learning curve.

Same request & response schema

Python · Node.js · REST · Go · Ruby

Streaming, tool-calling, structured output

Automatic failover & load balancing

Python

from openai import OpenAI

client = OpenAI(
  api_key=bel-your-key,
  base_url=https://api.belugapi.com/v1
)

response = client.chat.completions.create(
  model=gemini-3.1-pro-preview,
  messages=[{"role": user, "content": Hello!}]
)
print(response.choices[0].message.content)

Node.js

import OpenAI from openai;

const client = new OpenAI({
  apiKey:  bel-your-key,
  baseURL: https://api.belugapi.com/v1,
});

const res = await client.chat.completions.create({
  model:    gemini-3.1-pro-preview,
  messages: [{ role: user, content: Hello! }],
});
console.log(res.choices[0].message.content);

cURL

curl https://api.belugapi.com/v1/v1/chat/completions \
  -H Authorization: Bearer bel-your-key \
  -H Content-Type: application/json \
  -d {"model":"gemini-3.1-pro-preview","messages":[{"role":"user","content":"Hello!"}]}

Highlights

Built for production.

Multimodal

Long context

Advanced reasoning

Complete guide

Everything about
Gemini 3.1 Pro Preview.

Specifications, pricing, capabilities, and integration tips — kept up to date with every Google release.

By Google 2 min read Updated May 2026

Latest Gemini 3.1 Pro with enhanced capabilities

Overview

Gemini 3.1 Pro Preview is a cutting-edge large language model (llm) developed by Google, designed to push the boundaries of artificial intelligence-powered content generation.

This model excels in multimodal, long context, advanced reasoning, making it a top choice for professionals seeking high-quality, scalable AI solutions. Whether you're building production applications, researching new AI capabilities, or creating stunning visual content, Gemini 3.1 Pro Preview delivers industry-leading performance and reliability.

Key Specifications

Specification	Details
Model Name	Gemini 3.1 Pro Preview
Provider	Google
Category	Large Language Model (LLM)
Model Type	Chat
Context Window	1M+

Pricing

Input: $1.6/M tokens
Output: $9.6/M tokens

Key Features & Capabilities

Multimodal: Advanced capability for professional-grade output.
Long Context: Advanced capability for professional-grade output.
Advanced Reasoning: Advanced capability for professional-grade output.

Use Cases & Applications

Customer support chatbots
Content creation and writing assistants
Knowledge base Q&A systems
Educational tutoring platforms

Frequently asked questions

What is Gemini 3.1 Pro Preview best used for?

Gemini 3.1 Pro Preview excels at multimodal, long context, advanced reasoning, making it ideal for professional and enterprise applications.

Who developed Gemini 3.1 Pro Preview?

Gemini 3.1 Pro Preview was developed by Google, a leading AI research and development company.

How do I integrate Gemini 3.1 Pro Preview into my application?

You can integrate Gemini 3.1 Pro Preview via its official API endpoint using standard HTTP requests with your API key. SDKs are available for Python, JavaScript, and other languages.

What is the pricing model for Gemini 3.1 Pro Preview?

Pricing is based on input. Check the pricing section above for detailed rates.

Ready to ship? Start using Gemini 3.1 Pro Preview in under 30 seconds.

Get free API key