GPT‑5.4 Pro overview
GPT‑5.4 Pro by OpenAI
Meet GPT‑5.4‑Pro, OpenAI’s most advanced large language model, built for professionals who demand precision, depth, and context‑aware intelligence.
GPT‑5.4 Pro specs
- Model ID
openai/gpt-5.4-pro- Developer
- OpenAI
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
- Input
- Text
- Output
- Text
- API
- OpenAI-compatible, base URL
https://api.aimlapi.com/v1
What is GPT-5.4-Pro API?
A specialized iteration in OpenAI's GPT-5 family, engineered specifically around reasoning depth and task accuracy. It sits within the GPT-5 lineage as a performance-tuned variant, the "Pro" designation reflects optimizations made specifically for professional and technical use cases that demand more precision than baseline GPT-5 offers.
Deep Multi‑Step Reasoning
GPT‑5.4‑Pro is optimized for analytical and logical reasoning, allowing it to break down problems, handle nested conditions, and produce coherent multi‑stage solutions, ideal for tasks like algorithmic design, legal drafting, and complex research synthesis.
Precision Coding and Debugging
With support for dozens of programming languages, the model delivers more accurate code completions, bug detection, and refactoring suggestions. GPT‑5.4‑Pro can analyze entire codebases within long contexts, improving project scalability and maintainability.
Extended Context Retention
Leveraging OpenAI’s new long‑context transformer architecture, the model maintains focus across documents, conversations, or sessions spanning hundreds of thousands of tokens, ensuring continuity and nuanced understanding in ongoing projects.
Adaptive Communication Style
Whether drafting academic reports, business proposals, or creative narratives, GPT‑5.4‑Pro automatically adjusts tone, structure, and vocabulary to match the user’s desired output, offering natural, human‑like fluency in over 50 languages.
Enterprise‑Grade Reliability
Built for professional environments, GPT‑5.4‑Pro integrates robust security protocols, scalable API access, and customizable model behavior. Organizations can tune it for domain‑specific reasoning, compliance, or internal data privacy needs.
Use cases
GPT-5.4 Pro is documented as suitable for professional knowledge work, including document and spreadsheet creation, coding, data analysis, agentic workflows, and software automation.
It is also described as useful when output needs to be decision-ready, hard to revise after the fact, or “exec-safe,” with an emphasis on quality and depth over speed.
For deeper analytical work, it is said to fit scenarios requiring analytical depth and completeness, including scientific research and complex problems.
It is additionally presented as a strong choice for long-horizon deliverables such as slide decks, financial models, and legal analysis.
Capabilities
- Function calling
- Streaming
- Structured outputs
- Reasoning
- Web search
GPT‑5.4 Pro API pricing
| Usage | Price | Unit |
|---|---|---|
| Input | $31.74 | 1M tokens |
| Output | $190.44 | 1M tokens |
Prices from the AI/ML API price list, checked on Nov 4, 2026.
GPT‑5.4 Pro vs other models: token prices
AI/ML API input and output rates for 5 models, per million tokens.
| Model | Input | Output |
|---|---|---|
 GPT‑5.4 Pro | $31.74 | $190.44 |
| GPT-6 Luna | $0.1 | $0.5 |
| GPT-6.1 Terra | $1 | $5 |
| GPT-6.1 Sol | $2 | $10 |
| GPT-6.1 Terra Pro | $2.12 | $10.58 |
How to use the GPT‑5.4 Pro API
View docs
Build with your agent
Give your agent the model details, code and documentation.
1Get your API key
Create API keyexport AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"2Make your first request
curl 'https://api.aimlapi.com/v1/chat/completions' \
-H "Authorization: Bearer $AIMLAPI_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "openai/gpt-5.4-pro",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "openai/gpt-5.4-pro",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}
response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = await fetch("https://api.aimlapi.com/v1/chat/completions", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"model": "openai/gpt-5.4-pro",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());Models similar to GPT‑5.4 Pro
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GPT‑5.4 Pro FAQ
What is the context window of GPT‑5.4 Pro?
GPT‑5.4 Pro has a 1,050,000 tokens context window and can return up to 128,000 tokens.
What inputs and outputs does GPT‑5.4 Pro support?
GPT‑5.4 Pro takes image, text as input and returns text.
What is the model ID for GPT‑5.4 Pro?
Use openai/gpt-5.4-pro as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
How much does GPT‑5.4 Pro cost?
GPT‑5.4 Pro costs $31.74 input and $190.44 output per 1M tokens on AI/ML API, billed as you go with no subscription.
Does GPT‑5.4 Pro support streaming?
Yes, GPT‑5.4 Pro can stream responses as they are generated.
Can GPT‑5.4 Pro read images?
Yes, GPT‑5.4 Pro accepts image input alongside text.
Who created GPT‑5.4 Pro?
GPT‑5.4 Pro was built by OpenAI.
Can I access GPT‑5.4 Pro through an API?
Yes. It is available via the endpoint https://api.aimlapi.com/v1/chat/completions.