GPT 5.4 Pro API Pricing & Quick Start

Name: GPT 5.4 Pro API
Brand: OpenAI

GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K...

Speed#166 / 586

0.0

Output tokens per second (median)

Input Price#584 / 586

$30.00NT$ 972

USD / 1M tokens

Output Price#585 / 586

$180.00NT$ 5829

USD / 1M tokens

First-token latency#1 / 586

0.00s

Time to first token (AA median)

Provider	OpenAI
Released	March 2026
Model ID	`openai/gpt-5.4-pro`

Technical specifications

Context window

1M tokens

Reasoning

Yes

Input

TextImageFile

Output

Text

Pricing comparison

BazaarLink retail price alongside AA's observed market standard.

BazaarLink price our site

Input$30.00NT$ 972

Output$180.00NT$ 5829

Cache read—

Cache write—

3:1 blended (est.)$67.50NT$ 2186

All prices per 1M tokens. Supports TWD credit card / official invoice.

Market reference Artificial Analysis

Input$30.00

Output$180.00

Cache readAA not tracked

Cache writeAA not tracked

3:1 blended$67.50

✓ Matches market reference — BazaarLink does not mark up.
Source: artificialanalysis.ai

Independent benchmarks

Scores below come from Artificial Analysis, an independent third party. BazaarLink does not participate in the testing.

Intelligence

Coding

Math

MMLU

GPQA

This modelCategory leader

Time to first token

🥇

#1out of 586 models

AA 全球 p50：0.00 秒

Top 5 — CodingCoding Index leaderboard

1GPT-5.6 Sol (xhigh)openai/gpt-5-6-sol-xhigh78$5 / $30

2Claude Opus 5 (Adaptive Reasoning, Max Effort)anthropic/claude-opus-578$5 / $25

3GPT-5.6 Sol (max)openai/gpt-5-6-sol77$5 / $30

4GPT-5.6 Sol (high)openai/gpt-5-6-sol-high77$5 / $30

5Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)anthropic/claude-opus-5-xhigh77$5 / $25

AASource: Artificial Analysis · Independent third-party evaluation; not influenced by BazaarLinkView full evaluation on AA →

Quick Start

Use GPT 5.4 Pro via BazaarLink API — just change the base_url:

Python

from openai import OpenAI

client = OpenAI(
    base_url="https://bazaarlink.ai/api/v1",
    api_key="sk-bl-YOUR_API_KEY",
)

response = client.chat.completions.create(
    model="openai/gpt-5.4-pro",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

TypeScript

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://bazaarlink.ai/api/v1",
  apiKey: "sk-bl-YOUR_API_KEY",
});

const response = await client.chat.completions.create({
  model: "openai/gpt-5.4-pro",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Why use GPT 5.4 Pro via BazaarLink?

✓USD billing (TWD-quoted) + unified invoices — no foreign credit card needed for Taiwan teams
✓OpenAI-compatible API — zero code changes required
✓Automatic failover — multi-provider redundancy for the same model
✓Chinese-language support — local team, instant help

Try Now ← All Models

Frequently Asked Questions

What is GPT 5.4 Pro?

How much does the GPT 5.4 Pro API cost?

GPT 5.4 Pro costs $30.0000 per 1M input tokens and $180.0000 per 1M output tokens when accessed through BazaarLink.

How do I use GPT 5.4 Pro with the OpenAI SDK?

Set base_url to "https://bazaarlink.ai/api/v1" and use model ID "openai/gpt-5.4-pro". All OpenAI SDK methods (chat.completions, embeddings, streaming) work without code changes.

What is the context window for GPT 5.4 Pro?

GPT 5.4 Pro supports a context window of 1,050,000 tokens.

Is GPT 5.4 Pro available for free?

GPT 5.4 Pro is a paid model. BazaarLink offers free trial credits on registration so you can test it without a credit card.

Relay integrity checks

Tested endpoints: 5 runs
Independent hosts: 3
Model-family fingerprint match: 100%
Anomalies detected: 5 runs
Data range: past 90 days

BazaarLink Probe verifies endpoints that claim to serve this model and flags behavior that differs from the reference baseline.

View the full integrity report →