gemini-3.1-pro-preview-customtools

completions

byopenrouter

gemini-3.1-pro-preview-customtools

completions

Published by: googleProvider:

openrouter

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 or user-defined functions are available. This specialized preview endpoint significantly increases function calling reliability and ensures the model selects the most appropriate tool in coding agents and complex, multi-tool workflows. It retains the core strengths of Gemini 3.1 Pro, including multimodal reasoning across text, image, video, audio, and code, a 1M-token context window, and strong software engineering performance.

Released

Feb 19, 2026

Knowledge

Jan 31, 2025

License

Proprietary

Context

1048576

Input

$2 / 1M tokens

Output

$12 / 1M tokens

Capabilities: tools, reasoning

Accepts: text, image

Returns: text

Released Feb 19, 2026Knowledge Cutoff: Jan 31, 2025License: Proprietary

Context: 1048576 Input: $2 / 1M tokensOutput: $12 / 1M tokensCapabilities: tools, reasoningAccepts: text, imageReturns: text

Access gemini-3.1-pro-preview-customtools through LangDB AI Gateway

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Benchmark Results for gemini-3.1-pro-preview-customtools

Category Performance Scores:

Science: Score 85.20 (Top 0% - Rank #0)
Writing: Score 74.73 (Top 5% - Rank #18)
Academia: Score 75.70 (Top 0% - Rank #0)
Marketing: Score 73.83 (Top 3% - Rank #11)
Programming: Score 55.50 (Top 0% - Rank #0)

Overall Performance: 72.99199999999999 average score across all categories

Detailed Benchmark Scores:

Benchmark	Score	Percentile	Domain
HLE	44.70	Top 0%	General Knowledge
GPQA	94.20	Top 0%	STEM (Physics, Chemistry, Biology)
SciCode	58.90	Top 0%	Scientific
AA Coding Index	55.50	Top 0%	Programming
AAII	57.20	Top 0%	General

GPQA Score: 94.20 - Graduate-level reasoning benchmark

Model Comparison:

Provider: openrouter

Model Type: completions

Context Size: 1048576 tokens

Comparing against 348 models in the database

Category Scores

science#2 academia#2 marketing#8 programming#2

Benchmark Tests

View Other Benchmarks

HLE

44.7

General Knowledge

GPQA

94.2

STEM (Physics, Chemistry, Biology)

SciCode

58.9

Scientific

AA Coding Index

55.5

Programming

AAII

57.2

General

Metric	HLE	GPQA	SciCode	AA Coding Index	AAII
Score	44.7	94.2	58.9	55.5	57.2

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Code Examples

Integration samples and API usage

Code Samples for gemini-3.1-pro-preview-customtools

Python SDK Example:

from openai import OpenAI

client = OpenAI(
    base_url="https://api.us-east-1.langdb.ai/projects/<your_project_id>",
    api_key="<your_api_key>"
)

response = client.chat.completions.create(
    model="gemini-3.1-pro-preview-customtools",
    messages=[
        {"role": "user", "content": "Hello, how are you?"}
    ]
)

print(response.choices[0].message.content)

TypeScript SDK Example:

import OpenAI from 'openai';

const client = new OpenAI({
    baseURL: "https://api.us-east-1.langdb.ai/projects/<your_project_id>",
    apiKey: "<your_api_key>"
});

const response = await client.chat.completions.create({
    model: "gemini-3.1-pro-preview-customtools",
    messages: [
        { role: "user", content: "Hello, how are you?" }
    ]
});

console.log(response.choices[0].message.content);

cURL Example:

curl -X POST "https://api.us-east-1.langdb.ai/projects/<your_project_id>/v1/chat/completions" \
  -H "Authorization: Bearer <your_api_key>" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-3.1-pro-preview-customtools",
    "messages": [
        {"role": "user", "content": "Hello, how are you?"}
    ]
  }'

Model: gemini-3.1-pro-preview-customtools

Provider: openrouter

API Endpoint: $https://api.us-east-1.langdb.ai

Create API Key

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gemini-3.1-pro-preview-customtools by openrouter - AI Model Details, Pricing, and Performance Metrics

gemini-3.1-pro-preview-customtools

gemini-3.1-pro-preview-customtools

Access gemini-3.1-pro-preview-customtools through LangDB AI Gateway

Category Scores

Benchmark Tests

Compare with Similar Models

Code Examples

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