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GEMINI 3.1ProPreview model details and integration guide

GEMINI 3.1ProPreview is positioned for text workloads with flat per-call pricing on HeyWaii.

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Page last updated: April 27, 2026

Relay Access

Base URL: https://www.heywaii.com/v1

Model ID: gemini-3.1-pro-preview

Overview

GEMINI 3.1ProPreview is part of the HeyWaii API Market catalog for text-heavy product workflows, assistants, and automation tasks.

This model is configured with per-call billing, so cost is easy to estimate before sending the request.

It is available in the catalog with model positioning and a public sale price from the current workbook.

Model explainer

GEMINI 3.1ProPreview is a text generation API model page built to explain capability fit, real workflow value, and integration friction.

GEMINI 3.1ProPreview is strongest around Predictable request cost, General text workflows, Simple product integration, which makes it a practical option for product-facing workflows.

If your workload is close to App copilots, Workflow automation, Developer-facing AI integrations, this page should be enough to start model selection and pre-rollout testing.

From a modality angle, GEMINI 3.1ProPreview fits Text generation, Per call workflows and can be validated on one core use case before wider rollout.

Related use-case hubs

Public pricing and price advantage

Public sell-side pricing is $5.00/call, making it easier to test cost, stage rollouts, and estimate volume budgets.

HeyWaii public price

call

$5.00/call

Official input

1M tokens

≤20 万 token 上下文：$2.00 / 1M tokens >20万token长上下文：$4.00 / 1M tokens

75% lower

Official output

1M tokens

≤20 万 token 上下文：$12.00 / 1M tokens >20万token长上下文：$18.00 / 1M tokens

75% lower

OpenRouter output

1M tokens

$12.00 / 1M tokens

58% lower

Pricing readout

GEMINI 3.1ProPreview is publicly listed at $5.00/call, so you can estimate cost before rollout.

Per-call billing keeps single-task costs easier to predict for generation-style workloads.

OpenAI-compatible access reduces the cost of retooling SDKs and request formats.

Comparison cards only show public price baselines that can be verified for this page.

How to call

1. Create a HeyWaii API key first so GEMINI 3.1ProPreview can be tested from a real environment.

2. Point your base URL to the HeyWaii relay and keep your existing OpenAI-compatible request flow.

3. Set the model to gemini-3.1-pro-preview, validate on low traffic first, then scale up.

Selection guidance

Low-friction API access for text generation workflows.

OpenAI-compatible integration helps reduce migration overhead.

Per-call billing is easier to control for one-off tasks.

FAQ

What is GEMINI 3.1ProPreview actually good for?

GEMINI 3.1ProPreview is currently best suited for App copilots, Workflow automation, Developer-facing AI integrations. Before production rollout, validate it on your highest-value task first.

How much does GEMINI 3.1ProPreview cost on HeyWaii?

GEMINI 3.1ProPreview is listed here at $5.00/call, which makes cost modeling and staged rollout planning much easier before full deployment.

Can I use GEMINI 3.1ProPreview with an OpenAI-compatible stack?

If you already run an OpenAI-compatible stack, GEMINI 3.1ProPreview can usually be tested with the same request pattern after setting your API key, base URL, and model ID.

GEMINI 3.1ProPreview model details and integration guide

Overview

Model explainer

Related use-case hubs

Best for

Modalities

Public pricing and price advantage

Model capability metrics

Similar model comparison

How to call

Selection guidance

FAQ

What is GEMINI 3.1ProPreview actually good for?

How much does GEMINI 3.1ProPreview cost on HeyWaii?

Can I use GEMINI 3.1ProPreview with an OpenAI-compatible stack?