# Gemini 3.1 Pro Preview Custom Tools Usage, Cost & Rank | OpenCode Data

> Gemini 3.1 Pro Preview Custom Tools costs $2.00 per 1M input tokens and $12.00 per 1M output tokens.

Advanced Gemini model for complex reasoning, coding, and multimodal analysis

- Page: https://opencode.ai/data/google/gemini-3-1-pro-preview-customtools
- JSON: https://opencode.ai/data/google/gemini-3-1-pro-preview-customtools.json
- Model ID: google/gemini-3.1-pro-preview-customtools
- Lab: Google

## Model facts

| Fact | Value |
| --- | --- |
| Context window | 1M |
| Max output | 66K |
| Knowledge cutoff | 2025-01 |
| Release date | 2026-02-19 |
| Input modalities | text, image, video, audio, pdf |
| Output modalities | text |
| Reasoning | Yes |
| Tool calling | Yes |
| Open weights | No |

## Pricing: USD per 1M tokens

| Input | Output | Cached input | Cache write |
| --- | --- | --- | --- |
| $2.00 | $12.00 | $0.20 | - |

## Methodology

- Updates: Aggregated every hour. Days and weeks use UTC.
- Tokens: Input, output, reasoning, and cached tokens for each request.
- Users and sessions: Approximate counts of distinct users and OpenCode sessions.
- Cost: Session cost is the average cost per OpenCode session. Token prices are list prices from the OpenCode model catalog.
- Retention: The share of a model's users in one week who use it again the next week.
- Citation: Cite OpenCode Data (opencode.ai/data) with the update time shown at the top of the page.