Gemini 3.1 Pro Preview API Pricing & Quick Start

Name: Gemini 3.1 Pro Preview API
Brand: Google

Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...

Intelligence#80 / 638

Artificial Analysis Intelligence Index

Speed#118 / 329

109.6

Output tokens per second (median)

Input Price#338 / 437

$2.00NT$ 63

USD / 1M tokens

Output Price#357 / 437

$12.00NT$ 379

USD / 1M tokens

First-token latency#301 / 329

25.16s

Time to first token (AA median)

Provider	Google
Released	February 2026
Model ID	`google/gemini-3.1-pro-preview`

Technical specifications

Context window

1M tokens

Reasoning

Yes

Input

AudioFileImageTextVideo

Output

Text

Pricing comparison

BazaarLink retail price alongside AA's observed market standard.

BazaarLink price our site

Input$2.00NT$ 63

Output$12.00NT$ 379

Cache read$0.20NT$ 6

Cache write$0.38NT$ 12

3:1 blended (est.)$4.50NT$ 142

All prices per 1M tokens. Supports TWD credit card / official invoice.

Market reference Artificial Analysis

Input$2.00

Output$12.00

Cache readAA not tracked

Cache writeAA not tracked

3:1 blended$4.50

✓ Matches market reference — BazaarLink does not mark up.
Source: artificialanalysis.ai

Independent benchmarks

Scores below come from Artificial Analysis, an independent third party. BazaarLink does not participate in the testing.

Intelligence 30

Coding 69

Math

MMLU

GPQA 94

This modelCategory leader

Coding ability

#54out of 255 models

LiveCodeBench / SciCode and similar

Overall intelligence

#80out of 638 models

Aggregated across academic benchmarks

Time to first token

#301out of 329 models

AA 全球 p50：25.16 秒

Intelligence

Top 13%

This model

Category leader

Median

Coding

Top 21%

This model

Category leader

Median

GPQA

94%

—

This model

94%

Category leader

94%

Median

69%

HLE

45%

—

This model

45%

Category leader

53%

Median

SciCode

59%

—

This model

59%

Category leader

60%

Median

34%

IFBench

77%

—

This model

77%

Category leader

83%

Median

44%

τ²-Bench Telecom

96%

—

This model

96%

Category leader

99%

Median

46%

AA-LCR

73%

—

This model

73%

Category leader

76%

Median

40%

Terminal-Bench Hard

54%

—

This model

54%

Category leader

66%

Median

14%

Top 5 — CodingCoding Index leaderboard

1Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)?/claude-fable-5-182$10 / $50

2Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)?/claude-fable-5-1-xhigh81$10 / $50

3Claude Fable 5.1 (Adaptive Reasoning, High Effort, Default Fallback)?/claude-fable-5-1-high79$10 / $50

4GPT-5.6 Sol (xhigh)openai/gpt-5-6-sol-xhigh78$4 / $20

5Claude Opus 5 (Adaptive Reasoning, Max Effort)anthropic/claude-opus-578$5 / $25

AASource: Artificial Analysis · Independent third-party evaluation; not influenced by BazaarLinkView full evaluation on AA →

Quick Start

Use Gemini 3.1 Pro Preview via BazaarLink API — just change the base_url:

Python

from openai import OpenAI

client = OpenAI(
    base_url="https://api.bazaarlink.ai/v1",
    api_key="sk-bl-YOUR_API_KEY",
)

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

TypeScript

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.bazaarlink.ai/v1",
  apiKey: "sk-bl-YOUR_API_KEY",
});

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

Why use Gemini 3.1 Pro Preview via BazaarLink?

✓USD billing (TWD-quoted) + unified invoices — no foreign credit card needed for Taiwan teams
✓OpenAI-compatible API — zero code changes required
✓Automatic failover — multi-provider redundancy for the same model
✓Chinese-language support — local team, instant help

Try Now ← All Models

Frequently Asked Questions

What is Gemini 3.1 Pro Preview?

How much does the Gemini 3.1 Pro Preview API cost?

Gemini 3.1 Pro Preview costs $2.00 per 1M input tokens and $12.00 per 1M output tokens when accessed through BazaarLink.

How do I use Gemini 3.1 Pro Preview with the OpenAI SDK?

Set base_url to "https://api.bazaarlink.ai/v1" and use model ID "google/gemini-3.1-pro-preview". All OpenAI SDK methods (chat.completions, embeddings, streaming) work without code changes.

What is the context window for Gemini 3.1 Pro Preview?

Gemini 3.1 Pro Preview supports a context window of 1,048,576 tokens.

Is Gemini 3.1 Pro Preview available for free?

Gemini 3.1 Pro Preview is a paid model. BazaarLink offers free trial credits on registration so you can test it without a credit card.

Relay integrity checks

Tested endpoints: 235 runs
Independent hosts: 115
Model-family fingerprint match: 74%
Anomalies detected: 167 runs
Data range: past 90 days

BazaarLink Probe verifies endpoints that claim to serve this model and flags behavior that differs from the reference baseline.

View the full integrity report →

Gemini 3.1 Pro Preview API Pricing & Quick Start

Technical specifications

Pricing comparison

BazaarLink price our site

Market reference Artificial Analysis

Independent benchmarks

Top 5 — CodingCoding Index leaderboard

Quick Start

Why use Gemini 3.1 Pro Preview via BazaarLink?

Frequently Asked Questions

Relay integrity checks

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