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GPT 5.4High model details and integration guide

GPT 5.4High is positioned for text workloads with metered pricing on HeyWaii.

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Page last updated: April 26, 2026

Relay Access

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

Model ID: gpt-5.4-high

Overview

GPT 5.4High is part of the HeyWaii API Market catalog for text-heavy product workflows, assistants, and automation tasks.

This model is configured with metered billing, so cost tracks usage rather than a flat call count.

It is currently marked as a recommended option in the catalog.

Model explainer

GPT 5.4High is a text generation API model page built to explain capability fit, real workflow value, and integration friction.

GPT 5.4High is strongest around Token-based billing, Text generation, Production relay usage, 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, GPT 5.4High fits Text generation, Token metered workflows and can be validated on one core use case before wider rollout.

Best for

Public pricing and price advantage

Public sell-side pricing is $2.50/1M tokens, making it easier to test cost, stage rollouts, and estimate volume budgets.

HeyWaii public price

token

$2.50/1M tokens

Official output

1M tokens

$4.50 / 1M tokens

44% lower

Pricing readout

GPT 5.4High is publicly listed at $2.50/1M tokens, so you can estimate cost before rollout.

Metered billing is usually a better fit for longer conversations and sustained request volume.

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.

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How to call

1. Create a HeyWaii API key first so GPT 5.4High 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 gpt-5.4-high, 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.

Metered billing fits sustained or higher-volume usage.

FAQ

What is GPT 5.4High actually good for?

GPT 5.4High 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 GPT 5.4High cost on HeyWaii?

GPT 5.4High is listed here at $2.50/1M tokens, which makes cost modeling and staged rollout planning much easier before full deployment.

Can I use GPT 5.4High with an OpenAI-compatible stack?

If you already run an OpenAI-compatible stack, GPT 5.4High can usually be tested with the same request pattern after setting your API key, base URL, and model ID.

GPT 5.4High model details and integration guide

Overview

Model explainer

Best for

Modalities

Public pricing and price advantage

Model capability metrics

Similar model comparison

How to call

Selection guidance

FAQ

What is GPT 5.4High actually good for?

How much does GPT 5.4High cost on HeyWaii?

Can I use GPT 5.4High with an OpenAI-compatible stack?