GPT-5.4

GPT-5.4 is OpenAI’s advanced model for professional work, reasoning, and coding. It is designed for users who need more than a simple chatbot, especially developers, technical teams, and businesses that want an AI model that can handle long inputs, structured tasks, and tool-based workflows.

Unlike lightweight chat models built mainly for quick answers, GPT-5.4 focuses on accuracy, deeper reasoning, and getting real work done with less back-and-forth. It supports text input and output, image input, structured outputs, function calling, and a wide set of tools through the OpenAI API.

What is GPT-5.4?

GPT-5.4 is a large language model developed by OpenAI. According to OpenAI, it is built for complex professional tasks and combines strong reasoning with coding and agentic workflow capabilities. It is available through the OpenAI API as the model name gpt-5.4, and it has also rolled out in ChatGPT as GPT-5.4 Thinking for eligible paid users.

This makes GPT-5.4 useful not just for chatting, but for building applications, automating workflows, analyzing large documents, working across tools, and supporting technical or business tasks that require consistency and depth.

Main features

One of GPT-5.4’s standout features is its large context window. OpenAI lists a context window of 1,050,000 tokens, which means the model can process very large prompts, long documents, codebases, or multi-step task histories in a single session.

The model also supports structured outputs and function calling, which is especially helpful for developers building apps that need reliable JSON responses, tool usage, or automation logic. For teams creating AI-powered products, this makes GPT-5.4 much easier to integrate into real workflows.

Another major benefit is tool support through the Responses API. OpenAI lists support for tools such as web search, file search, image generation, code interpreter, hosted shell, computer use, MCP, and more. This gives GPT-5.4 broader practical value than a plain text-only model.

GPT-5.4 also supports streaming, image input, and reasoning controls. OpenAI notes that reasoning effort settings include none, low, medium, high, and xhigh, giving developers more control over speed and depth depending on the task.

Who should use GPT-5.4?

GPT-5.4 is best suited for developers, product teams, analysts, consultants, researchers, and businesses that need advanced AI performance for real tasks. It is especially useful when the work involves long instructions, technical reasoning, code generation, data-heavy workflows, or combining AI with external tools.

It can also be a strong fit for startups and software teams building AI agents, assistants, automation systems, internal tools, or customer-facing applications that need better reliability than entry-level models.

Common use cases

GPT-5.4 can be used for a wide range of professional tasks. Common use cases include coding assistance, debugging, documentation generation, workflow automation, research support, content drafting, structured data extraction, and multi-step business analysis.

Because it supports long context and tool use, it is also well suited for reviewing large files, summarizing complex reports, answering questions from internal documents, powering agent-style applications, and completing tasks that involve several steps instead of one-shot prompts.

For teams working in software, it can help write code, explain codebases, generate test cases, and connect to tools. For business users, it can assist with reports, internal knowledge search, document analysis, and process automation.

How to use GPT-5.4

The easiest way to use GPT-5.4 depends on your goal. If you want a ready-to-use interface, OpenAI has made GPT-5.4 available in ChatGPT as GPT-5.4 Thinking for supported paid plans. If you want to build with it, you can access it through the OpenAI API.

Using GPT-5.4 in the API

Developers can use GPT-5.4 by selecting gpt-5.4 as the model in the OpenAI API. It is available through endpoints including Responses, Chat Completions, Realtime, Batch, and Assistants. In practice, this means you can use it for chat apps, agent workflows, real-time systems, and backend automations.

A basic workflow usually looks like this: create an OpenAI account, get API access, choose GPT-5.4 as the model, send your prompt or structured input, and optionally connect tools like web search or file search depending on your application.

Using GPT-5.4 in ChatGPT

If your plan includes access, you can select GPT-5.4 Thinking inside ChatGPT. This is useful for brainstorming, planning, coding help, and deeper reasoning tasks without building your own app. OpenAI says the model can provide an upfront plan of its thinking in ChatGPT, which can help users guide the response before it completes the full task.

Pricing

GPT-5.4 uses a paid API pricing model. OpenAI lists pricing at $2.50 per 1 million input tokens, $0.25 per 1 million cached input tokens, and $15.00 per 1 million output tokens. OpenAI also notes that Batch API pricing is available at half the standard rate, while some other processing options may change the final cost.

For ChatGPT users, access depends on your subscription plan rather than token-based billing. OpenAI states that GPT-5.4 Thinking began rolling out to ChatGPT Plus, Team, and Pro users, while GPT-5.4 Pro is available to Pro and Enterprise plans. This means there is no general free plan specifically for GPT-5.4 access based on the publicly available information.

Supported platforms

GPT-5.4 is available on OpenAI’s cloud platform and works across web-based OpenAI products and developer APIs. For builders, it can be used in web apps, backend services, internal tools, and software products through the API. Since access is API-based, platform support is broad and depends mostly on the programming environment you use.

Integrations and ecosystem

GPT-5.4 supports integrations through OpenAI’s API features rather than through a fixed plugin marketplace. OpenAI lists support for tools such as web search, file search, code interpreter, hosted shell, computer use, and MCP. These features make it suitable for custom integrations with apps, workflows, databases, internal documents, and external services.

This flexibility is one of GPT-5.4’s biggest strengths. Instead of being limited to simple prompting, developers can build systems where the model reads files, searches for information, calls functions, and completes multi-step tasks.

Why GPT-5.4 stands out

GPT-5.4 stands out because it is built for serious work rather than only casual conversation. Its mix of long-context handling, strong reasoning, coding performance, and tool support makes it appealing for users who want an AI model that can do more than generate text.

It is especially strong for workflows where context matters, where external tools improve results, and where users need a model that can follow complex instructions more reliably. For developers and professional teams, that can mean better outputs, less manual cleanup, and more practical automation.

Final thoughts

GPT-5.4 is a powerful OpenAI model aimed at professional users, developers, and organizations that need advanced reasoning and workflow support. It is not a casual free AI tool, but for teams that want strong coding, long-context processing, and tool-enabled performance, it can be a very capable option.

If your work involves building AI products, automating business tasks, or handling large and complex inputs, GPT-5.4 is worth considering. Its feature set makes it a strong choice for modern AI applications that need both intelligence and flexibility.