Skip to content
ModelCap

Gemini 3.1 Pro Preview Custom Tools

API only

Google·google/gemini-3.1-pro-preview-customtools

Gemini 3.1 Pro Preview Custom Tools is a language model published by Google. 1 OpenRouter endpoint is published in the latest snapshot. It accepts text, audio, image, video, file input and returns text. The published context limit is 1.0M tokens. The catalogue declares support for reasoning, tool use, structured outputs.

Rank and capability evidence
See Gemini 3.1 Pro Preview
Route-specific operations remain below
Market Gravity
26.4
Secondary market signal

This separately configured or accelerated route is reviewed as the same underlying model identity as Gemini 3.1 Pro Preview. That canonical product owns rank and capability evidence; pricing, providers and other operational differences remain route-specific below.

Input
$2.00
per 1M tokens
Output
$12.00
per 1M tokens
Context
1.0M
tokens
Providers
1
endpoint
Gateway spend
—
latest · Vercel share

Providers

Uptime measured over the last 30 minutes
ProviderInputOutputContextQuantUptime
Google AI Studio$2.00$12.001.0M——

Deployment readiness

Metadata index
30.1
limited · 38% metadata coverage
Not capability
Artifact reproducibility
0.0
Access & legal clarity
30.3
Deployability
80.0
Evaluation provenance
0.0

Missing: artifactReproducibility.revision-sha, artifactReproducibility.architecture-and-model-type, artifactReproducibility.parameter-count, artifactReproducibility.serialized-weight-format, artifactReproducibility.base-lineage, accessLegalClarity.declared-license, accessLegalClarity.resolvable-license-terms, evaluationProvenance.admitted-evaluation-observations, evaluationProvenance.capability-family-breadth, evaluationProvenance.evaluation-source-diversity, evaluationProvenance.identity-and-source-confidence, evaluationProvenance.evaluation-dataset-revisions.

A metadata completeness and deployability index—not a safety certification, quality grade, or production-readiness claim.

Market activity

Venue coverage
Market Gravity
26.4
OpenRouter weekly popularity
#181 of 298

Market Gravity uses OpenRouter’s full-catalogue popularity order. Sparse Vercel top-ten observations appear only when published and do not affect the score.

Market Gravity breakdown

Usage55%
8.8

OpenRouter weekly popularity across the full model catalogue.

Liquidity25%
45.6

Independent providers versus the model's open or closed cohort, weighted by uptime.

Open reach15%
50.0

Hugging Face 30-day downloads for open models; neutral for closed models.

Freshness5%
53.7

Time since first public availability, on a six-month half-life.

Specification

Context window
1.0M tokens
Max output
66K tokens
Inputs
Text, Audio, Image, Video, File
Outputs
Text
Tokenizer
Gemini
Cached input tokens
$0.20 / 1M
First seen on OpenRouter
25 Feb 2026

Capabilities

  • Supported: Reasoning
  • Supported: Tool use
  • Supported: Structured output
  • Supported: Response format
  • Not supported: Moderated