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.
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.
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.
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.
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.
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.
GPT‑5.4‑Pro redefines productivity for developers, analysts, researchers, and content creators alike. Its enhanced reasoning engine is capable of connecting ideas across sources, identifying logical gaps, and generating insights that feel truly collaborative.
Users gain access to:
Real-world use cases where GPT-5.4-Pro's reasoning optimizations translate to measurable value.
Reading lengthy agreements, flagging ambiguous clauses, and summarizing obligations across multiple documents without losing precision on the details that matter most.
Full-codebase reasoning, architecture reviews, and debugging sessions where the problem spans many files — not just isolated function calls.
Compiling findings from multiple sources, reconciling conflicting data, and producing coherent summaries for technical or non-technical audiences.
Working through multi-step quantitative problems, checking model logic, and translating assumptions into structured outputs or documentation.
Drafting documentation, API references, or specifications that require sustained accuracy across long-form content where small errors compound.
Agentic pipelines where the model must follow complex multi-step instructions reliably, handle edge cases, and produce consistent structured outputs at scale.
Measured on the AI/ML API gateway across live traffic. Figures are medians unless stated. Last updated 2026-10-12.
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.
import requests r = requests.post( "https://api.aimlapi.com/v1/chat/completions", headers={"Authorization": "Bearer " + AIMLAPI_KEY}, json={ "model": "openai/gpt-5.4-pro", "messages": [ { "role": "user", "content": "Hello!" } ] }, ) print(r.json())
const r = 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": "Hello!" } ] }), }); console.log(await r.json());
curl -X POST 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":"Hello!"}]}'
OpenAI-compatible — swap the base URL and it works with your existing SDK.
| Type | Price |
|---|---|
| Input | |
| Output | |
| Model | Input | Output | Context | Best for |
|---|---|---|---|---|
GPT‑5.4 Pro This page | Reasoning + agents | |||
| Reasoning + agents | ||||
| Balanced coding + agents | ||||
| Long-context, multimodal & agentic workflows | ||||
| Reasoning + agents |
GPT‑5.4 Pro has a 1,050,000 tokens context window and can return up to 128,000 tokens.
GPT‑5.4 Pro takes image, text as input and returns text.
Use openai/gpt-5.4-pro as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
GPT‑5.4 Pro is priced at input $41.262 / 1M tokens, output $247.572 / 1M tokens.
Yes, GPT‑5.4 Pro can stream responses as they are generated.
Yes, GPT‑5.4 Pro accepts image input alongside text.
GPT‑5.4 Pro was built by OpenAI.
Yes. It is available via the endpoint https://api.aimlapi.com/v1/chat/completions.
