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Google: Gemini 3.1 Pro Preview

🇺🇸 Google · Gemini 3.1

Input Price $2.00 per million tokens NT$64.0
Output Price $12.00 per million tokens NT$384
Context Window 1.05M tokens Output limit: 66K
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Overview

Google: Gemini 3.1 Pro Preview is a large language model API from Google, part of its Gemini 3.1 model family. With $2.00 per million input tokens and $12.00 per million output tokens, it is a premium-tier model where output volume is the main cost to watch. Output tokens cost about 6× as much as input, so prompt-heavy workloads run noticeably cheaper than generation-heavy ones. An exceptionally large 1.05M-token context window (≈1,573 pages of text) means entire repositories or document collections can be processed without chunking. Beyond plain text it also accepts Audio, File, Image, Video input, so it can be applied to multimodal tasks rather than text alone. On Artificial Analysis's Intelligence Index it scores 46 (A grade), a useful proxy for its general reasoning strength relative to the other models tracked here. All prices on this page reflect OpenRouter's routed rates and are re-synced automatically every day; confirm against the provider's official pricing before committing to production.

Dimension Unit Price (USD) Price (TWD) Effective From
Input per 1M tokens $2.00 NT$64.0
Output per 1M tokens $12.00 NT$384
Cached Input per 1M tokens $0.200 NT$6.4
Cache Write per 1M tokens $0.375 NT$12.0
Reasoning per 1M tokens $12.00 NT$384
Image Input per image $0.0000 NT$0.00
Audio Input per minute $0.0000 NT$0.00
Web Search per search $0.014 NT$0.45

Provider
Google
Model Family
Gemini 3.1
Version String
google/gemini-3.1-pro-preview
Status
Active
Modality
Audio, File, Image, Text, Video
Context Window
1,048,576 tokens
Output Limit
65,536 tokens

Index Metrics

Cross-domain capability indexes evaluated by Artificial Analysis — Artificial Analysis

Agentic Index 21 D Measured: 2026-07-01
Coding Index 69 S Measured: 2026-07-01
Intelligence Index 46 A Measured: 2026-07-01

Benchmark Scores

Data source: Artificial Analysis

AA-LCR 72.7% B Measured: 2026-07-01
GPQA Diamond 94.1% S Measured: 2026-07-01
HLE 44.7% S Measured: 2026-07-01
IFBench 77.1% A Measured: 2026-07-01
MMMU Pro 82.4% A Measured: 2026-07-01
Non-Hallucination 50.1% Measured: 2026-07-01
Omniscience Accuracy 55.3% Measured: 2026-07-01
SciCode 58.9% A Measured: 2026-07-01
Tau2 95.6% Measured: 2026-07-01
TerminalBench 53.8% Measured: 2026-07-01

Performance Metrics

Real-world benchmarks, updated every 72 hours by Artificial Analysis — Artificial Analysis

First Token Latency 23.8s Measured: 2026-07-01
Output Speed 134 t/s Measured: 2026-07-01
Response Time 27.5s Measured: 2026-07-01

Use Case Analysis

Model strengths, weaknesses, and ideal use cases based on benchmarks and official documentation

Strength

  • Advanced Reasoning & Multimodal Most advanced reasoning Gemini model. Comprehends vast datasets from text, audio, images, video, PDFs, and code. Official
  • Thinking Support Supports thinking capability with configurable levels (LOW, MEDIUM, HIGH) for flexible reasoning depth. Official

Best For

  • Multimodal Complex Tasks Tasks requiring understanding of multiple data types (text, images, video, audio, PDFs) simultaneously. Official
  • Agentic Workflows with Custom Tools Agentic workflows that heavily rely on custom tools and bash commands. Official

Weakness

  • Preview Status Still in public preview (as of February 2026), which may indicate ongoing development and potential changes. Official

90-Day Price Trend

Input / Output price (USD per 1M tokens)

Past 90 days of records; every price change is shown here

Date Dimension Price (USD) Source
Web Search $0.014 OpenRouter
Audio Input $0.0000 OpenRouter
Image Input $0.0000 OpenRouter
Reasoning $12.00 OpenRouter
Cache Write $0.375 OpenRouter
Cached Input $0.200 OpenRouter
Output $12.00 OpenRouter
Input $2.00 OpenRouter
Web Search $0.014 OpenRouter
Audio Input $0.0000 OpenRouter
Image Input $0.0000 OpenRouter
Reasoning $12.00 OpenRouter
Cache Write $0.375 OpenRouter
Cached Input $0.200 OpenRouter
Output $12.00 OpenRouter
Input $2.00 OpenRouter
Web Search $0.014 OpenRouter
Audio Input $0.0000 OpenRouter
Image Input $0.0000 OpenRouter
Reasoning $12.00 OpenRouter
Cache Write $0.375 OpenRouter
Cached Input $0.200 OpenRouter
Output $12.00 OpenRouter
Input $2.00 OpenRouter
Web Search $0.014 OpenRouter
Audio Input $0.0000 OpenRouter
Image Input $0.0000 OpenRouter
Reasoning $12.00 OpenRouter
Cache Write $0.375 OpenRouter
Cached Input $0.200 OpenRouter
Output $12.00 OpenRouter
Input $2.00 OpenRouter
Web Search $0.014 OpenRouter
Audio Input $0.0000 OpenRouter
Image Input $0.0000 OpenRouter
Reasoning $12.00 OpenRouter
Cache Write $0.375 OpenRouter
Cached Input $0.200 OpenRouter
Output $12.00 OpenRouter
Input $2.00 OpenRouter
Web Search $0.014 OpenRouter
Audio Input $0.0000 OpenRouter
Image Input $0.0000 OpenRouter
Reasoning $12.00 OpenRouter
Cache Write $0.375 OpenRouter
Cached Input $0.200 OpenRouter
Output $12.00 OpenRouter
Input $2.00 OpenRouter
Web Search $0.014 OpenRouter
Audio Input $0.0000 OpenRouter

Key Insights

Key data points from this page for quick reference and citation.

  • Google: Gemini 3.1 Pro Preview Input price: $2/M tokens
  • Google: Gemini 3.1 Pro Preview Output price: $12/M tokens
  • Context window: 1,048,576 tokens
  • Provider: Google
  • Model family: Gemini 3.1
  • Modalities: Audio, File, Image, Text, Video
  • Data source: OpenRouter, updated daily