googleListed Feb 25, 2026

Google: Gemini 3.1 Pro Preview Custom Tools

Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...

Context window1M
Max output65.5K
Provider endpoints2
Benchmark results0
Measured performance

Benchmark results

All leaderboards ↗
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No published results in this index yet

Scores appear here when an evaluation matches this exact model.

Access & cost

Prices across providers

3 quotes

OpenRouter

Catalog quote
Input
$2.00
Output
$12.00
Cached input
$0.20
USD / 1M tokens
1M context65.5K max outputPrice source ↗Checked Oct 17, 2026
Endpoint IDgoogle/gemini-3.1-pro-preview-customtools

Google AI Studio

via OpenRouter

google-ai-studio · prompt ≤ 200000 tokens

Input
$2.00
Output
$12.00
Cached input
$0.20
USD / 1M tokens

Cache write $0.375/M tokens · Audio input $2/M audio tokens · Cached audio input $0.2/M audio tokens · Audio tokens use separate rates from text input · Web search $0.014/search

1M context65.5K max outputPrice source ↗Checked Oct 17, 2026
Endpoint IDgoogle/gemini-3.1-pro-preview-customtools::google-ai-studio

Google AI Studio

via OpenRouter

google-ai-studio · prompt over 200000 tokens · rate option 1

Conditional rate
Input
$4.00
Output
$18.00
Cached input
$0.40
USD / 1M tokens

Cache write $0.375/M tokens · Audio input $4/M audio tokens · Cached audio input $0.4/M audio tokens · Audio tokens use separate rates from text input · Web search $0.014/search · A rate applies when all its listed conditions match. Dates and times use UTC.

1M context65.5K max outputPrice source ↗Checked Oct 17, 2026
Endpoint IDgoogle/gemini-3.1-pro-preview-customtools::google-ai-studio

Model specifications

Developer
google
Modality
Language
Context
1,048,576 tokens
Maximum output
65,536 tokens
Weights
Not reported
Provider listed
Feb 25, 2026
First discovered
Oct 16, 2026

Exact identities

  • openroutergoogle/gemini-3.1-pro-preview-customtools

Sources

Updated Oct 17, 2026

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$0.375in$1.875out/ 1M tokens · USDGoogle AI Studio · via OpenRouter · 9 endpointsgoogle-ai-studio/flex · tier=flex