Gemini 3.1 Pro Preview Custom Tools is a specialized variant of Google's Gemini 3.1 Pro designed to improve tool use in complex agentic workflows. It increases function calling reliability and steers the model toward registered custom functions instead of defaulting to a generic bash tool, which makes it well suited to coding agents and multi-tool systems where the model must pick the right tool for each task. With a 1M token context window and strong reasoning, the model retains Gemini 3.1 Pro's multimodal understanding across text, images, video, audio, and code. It is aimed at developers building agents that orchestrate many custom tools and APIs, where consistent and accurate tool selection matters more than raw breadth.
Gemini 3.1 Pro Preview Custom Tools runs on 1 route through the qynio gateway. Compare residency, zero retention, and training posture at a glance — full data-handling detail per route below.
| Provider | Region | Zero data retention | Training | Input | Output |
|---|---|---|---|---|---|
| US | Not by default | No | $2.00 | $12.00 |
Gemini 3.1 Pro Preview Custom Tools runs on a single route through the qynio gateway today, so its availability is that provider's availability.
Name a second model in the same request and the gateway tries it on retriable errors, so a busy hour never has to reach your users. .
Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. See uptime for every provider qynio monitors.
Each route hosting Gemini 3.1 Pro Preview Custom Tools has its own privacy posture, residency, and no-KYC terms. Postures are maintained by qynio with a last-verification timestamp.
Zero data retention is not on by default — abuse monitoring. No training on customer data. US; wallets; deposit available.
Call Gemini 3.1 Pro Preview Custom Tools through the qynio gateway with one API key. Let your coding agent set it up, or call it directly — qynio is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.
Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up qynio for you.
import OpenAI from "openai";const client = new OpenAI({apiKey: process.env.QYN_API_KEY,baseURL: "https://api.qyn.io/v3/compat",});const completion = await client.chat.completions.create({model: "gemini/gemini-3.1-pro-preview-customtools",messages: [{ role: "user", content: "Hello" }],});console.log(completion.choices[0].message.content);
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