---
title: Google: Gemini 3.1 Pro Preview Custom Tools — Pricing
canonical: https://prompeteer.ai/models/google-gemini-3-1-pro-preview-customtools
updated: 2026-09-20T00:00:00-07:00
source: OpenRouter /models
---

# Google: Gemini 3.1 Pro Preview Custom Tools

Google: Gemini 3.1 Pro Preview Custom Tools offers a 1,048,576-token context window at $2.00 per 1M input tokens and $12.00 per 1M output tokens.

| Attribute | Value |
| --- | --- |
| Context window | 1,048,576 tokens |
| Input price | $2.00 / 1M |
| Output price | $12.00 / 1M |
| Input modalities | text, audio, image, video, file |
| Model id | google/gemini-3.1-pro-preview-customtools |

## FAQ

**What is the context window of Google: Gemini 3.1 Pro Preview Custom Tools?**

Google: Gemini 3.1 Pro Preview Custom Tools supports up to 1,048,576 tokens of context.

**How much does Google: Gemini 3.1 Pro Preview Custom Tools cost?**

$2.00 per 1M input tokens and $12.00 per 1M output tokens (via OpenRouter /models, as of Sep 20, 2026).

**What input types does Google: Gemini 3.1 Pro Preview Custom Tools support?**

Google: Gemini 3.1 Pro Preview Custom Tools accepts text, audio, image, video, file.

Source: Data via OpenRouter /models — as of Sep 20, 2026.

## Sources and scope

[OpenRouter model catalogue feed](https://openrouter.ai/api/v1/models)

- [Google: Gemini 3.1 Pro Preview Custom Tools source listing](https://openrouter.ai/google/gemini-3.1-pro-preview-customtools)

These are provider-catalog specifications, not a task-quality benchmark. Prices describe the source listing and may vary by provider or routing. Unknown values are shown as — when the feed did not supply that value.

## Try your task

[Open the prompt composer](/create)

Open the composer and choose a supported target model. The reference catalogue may include models unavailable in the composer.