Models/GPT-5.4 Pro

GPT-5.4 Pro

gpt-5.4-pro

Uses more compute to think deeper and deliver consistently better answers. Supports multi-turn model interactions and advanced API features.

Deep ReasoningMulti-turnFrontier

Input$6.618

Output$52.942

per 1M tokens

Deep Reasoning

Multi-turn Interaction

Advanced multi-turn model support

Frontier Model

State-of-the-art performance

Professional Grade

Built for complex professional work

API Documentation

View complete API reference with all parameters and examples.

View Docs

Advanced Features

Streaming

Enable real-time streaming responses with Server-Sent Events.

{
  "model": "gpt-5.4-pro",
  "stream": true,
  "messages": [...]
}

Function Calling (Tools)

Enable the model to use tools and call functions.

{
  "model": "gpt-5.4-pro",
  "tools": [{
    "type": "function",
    "function": {
      "name": "get_weather",
      "description": "Get current weather for a location",
      "parameters": {
        "type": "object",
        "properties": {
          "location": {"type": "string", "description": "City name"}
        },
        "required": ["location"]
      }
    }
  }],
  "messages": [{"role": "user", "content": "What's the weather in Tokyo?"}]
}

JSON Mode

Get structured JSON responses from the model.

{
  "model": "gpt-5.4-pro",
  "response_format": {"type": "json_object"},
  "messages": [{"role": "user", "content": "Extract info as JSON: John is 30 years old"}]
}

API Parameters Reference

Parameter	Type	Required	Description
model	string	Yes	Model identifier (e.g., gpt-5.4-pro)
messages	array	Yes	Array of message objects with role and content
max_tokens	integer	No	Maximum tokens in the response
stream	boolean	No	Enable streaming responses (SSE)
temperature	number	No	Sampling temperature (0.0 - 2.0)
top_p	number	No	Nucleus sampling threshold (0.0 - 1.0)
tools	array	No	Function calling tools definition
response_format	object	No	Output format (e.g., json_object)

Full API Documentation

View complete API reference with streaming, thinking, and more.

View Documentation

Pricing

Input

$6.618

per 1M tokens

Output

$52.942

per 1M tokens

Billing: Cost = (input_tokens * input_price + output_tokens * output_price) / 1,000,000

About GPT-5.4 Pro

GPT-5.4 Pro is a Large Language Model API provided by OpenAI. Uses more compute to think deeper and deliver consistently better answers. Supports multi-turn model interactions and advanced API features. Through API Models platform, you can access this model via a unified API at prices significantly lower than official rates. Current pricing: Input: $6.618, Output: $52.942 per 1M tokens.

Key Features

Deep Reasoning -- More compute for better answers
Multi-turn Interaction -- Advanced multi-turn model support
Frontier Model -- State-of-the-art performance
Professional Grade -- Built for complex professional work

Use Cases

Chatbot & Customer Support

Build intelligent conversational systems to automatically answer user queries and improve service efficiency.

Content Generation

Automatically write articles, emails, ad copy, and other text content to boost productivity.

Code Assistant

Assist with code writing, debugging, and code review to accelerate software development.

Data Analysis

Understand and analyze unstructured data, extract key insights, and generate summary reports.

Why API Models

Unified API -- One API key to access all models, no need to register on multiple platforms
Cost Savings -- 60-95% cheaper than official pricing, ideal for indie developers and startups
Instant Access -- Start using immediately after signup, supports Stripe and Alipay payments
Full Documentation -- Detailed API docs with code examples in cURL, Python, and Node.js

Frequently Asked Questions

How much does GPT-5.4 Pro cost?

GPT-5.4 Pro is available through API Models at: Input: $6.618, Output: $52.942 per 1M tokens. This is up to 95% cheaper than official pricing.

How to use GPT-5.4 Pro API?

Sign up at API Models, get your API key, and call our unified API endpoint. We provide detailed API documentation with code examples in cURL, Python, and Node.js.

What is the difference between API Models and the official OpenAI API?

API Models offers the same GPT-5.4 Pro model at 60-95% lower cost through our aggregation platform. We provide a unified API interface so you do not need separate accounts for each provider - one API key to access all models.

What payment methods are supported?

We support Stripe (Visa, Mastercard, and other international cards) and Alipay. Credits are available instantly after payment.