How to Use ChatGPT 5.4: 6 Powerful Features You Should Know

Pour use ChatGPT 5.4, simply access the new “Thinking” or “Pro” models available in ChatGPT Plus, Team, Pro, or via the OpenAI API. Released in March 2026, GPT-5.4 is OpenAI’s most capable frontier model designed specifically for professional work. Users can now leverage six powerful new features to transform their workflows: native computer use to directly operate software , a massive 1-million token context window , an efficient new Tool Search system , advanced step-by-step reasoning , a 33% reduction in factual errors , and state-of-the-art coding capabilities via Codex. To get started immediately, select “GPT-5.4 Thinking” from the model dropdown in your ChatGPT interface or configure the gpt-5.4 endpoint in your developer environment.

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What is ChatGPT 5.4? Understanding OpenAI’s 2026 Frontier Model

Released on March 5, 2026, GPT-5.4 is designed specifically as OpenAI’s most capable and efficient frontier model for professional work. It brings together recent advances in reasoning, coding, and agentic workflows into a single powerhouse.

By significantly reducing factual errors, this model is built to get complex, real-world tasks done effectively and with less back-and-forth.

The Evolution: From GPT-5.2 to GPT-5.4’s Agentic Workflows

*Previously reported as 64.7%. GPT‑5.3‑Codex achieves 74.0% with a newly introduced API parameter that preserves the original image resolution.

Building on GPT-5.2’s reasoning capabilities, GPT-5.4 acts as a massive leap forward for agentic workflows. It incorporates the industry-leading coding strengths of GPT-5.3-Codex while improving how the AI interacts with software environments and tools.

Notably, it reduces hallucinations: individual claims are 33% less likely to be false, and full responses are 18% less likely to contain errors relative to GPT-5.2.

ChatGPT 5.4 Thinking vs. GPT-5.4 Pro vs. Codex

To help you navigate the new ecosystem, here is a quick breakdown of the available versions:

• GPT-5.4 Thinking: Replaces GPT-5.2 Thinking in ChatGPT, providing upfront plans and advanced web research capabilities.
• GPT-5.4 Pro: Designed for users who need maximum performance on the most complex, multi-step tasks.
• GPT-5.4 (Codex/API): The first general-purpose model with native computer-use capabilities, supporting up to a 1M token context window for long-horizon planning.

How to Access and Enable ChatGPT 5.4 in Your Account

Getting started with the newest frontier model depends on your current subscription tier and platform. The rollout is gradual across ChatGPT and Codex as of March 2026.

Selecting Models in ChatGPT Plus, Team, and Pro Plans

If you are a paid ChatGPT user, upgrading your workflow is immediate, regardless of how much ChatGPT Plus currently costs in your region. GPT-5.4 Thinking is available today to ChatGPT Plus, Team, and Pro users.

Simply open your chat interface and select the new model from the top dropdown menu. GPT-5.4 Pro is exclusively available to Pro and Enterprise plan subscribers.

API Setup for Developers and Context Window Configurations

Developers can access the new models in the API right now using the gpt-5.4 et gpt-5.4-pro endpoints.

For massive documents, GPT-5.4 in Codex includes experimental support for a 1M context window. You can enable this by configuring model_context_window et model_auto_compact_token_limit in your API requests. Requests exceeding the standard 272K limit will count against usage at twice the normal rate.

Step-by-Step Guide: How to Use the ChatGPT 5.4 “Thinking” Features

The new Thinking feature completely revamps how users interact with AI on long, complex prompts. It is currently available on the web and Android app, and is coming soon to iOS.

Reading the Upfront Plan and Preamble

For complex queries, GPT-5.4 Thinking will now outline its work with a preamble before it starts generating the final answer.

This transparent upfront plan lets you see exactly how the AI intends to tackle your problem, ensuring its logic aligns with your goals from the very first second.

Mid-Response Course Correction: Steering Output in Real-Time

You no longer have to wait for the AI to finish a long response to realize it went off track. With GPT-5.4 Thinking, you can adjust course mid-response while the model is actively working.

By adding instructions on the fly, you arrive at the exact final output you need without wasting additional turns or starting over completely.

Mastering Native Computer Use and Vision in GPT-5.4

GPT-5.4 marks a major milestone as OpenAI’s first general-purpose model with native, state-of-the-art computer-use capabilities.

Operating Browsers and Software via Codex and the API

Developers can build agents that complete real tasks across software systems by issuing mouse and keyboard commands in response to screenshots.

Performance is industry-leading: on the OSWorld-Verified benchmark, GPT-5.4 achieves a 75.0% success rate, far exceeding GPT-5.2’s 47.3% and even surpassing human performance (72.4%).

Using “Playwright Interactive” for Visual Debugging and App Testing

OpenAI released an experimental Codex skill called Playwright (Interactive). This allows Codex to visually debug web and Electron applications seamlessly.

Incredibly, developers can use this tool to playtest and automate an application—like an isometric theme park simulation game—while the AI is actively building it.

Leveraging High-Fidelity Image Input for Complex Document Parsing

Vision capabilities have been drastically upgraded for dense, high-resolution images. The new original image input detail level supports full-fidelity perception up to 10.24M total pixels.

This directly translates to superior document parsing. On OmniDocBench, GPT-5.4 achieves a highly accurate average error rate of just 0.109, a noticeable improvement over GPT-5.2.

MMMUPro was run with reasoning effort set to xhigh. OmniDocBench was run with reasoning effort set to none, to reflect low-cost, low-latency performance.

Boosting Professional Productivity with ChatGPT 5.4 Tools

GPT-5.4 was built to execute real work products, from urgent care schedules to manufacturing diagrams. It dominates the GDPval benchmark, matching or beating industry professionals 83.0% of the time, proving its readiness for widespread ChatGPT commercial use in 2026.

State-of-the-Art Knowledge Work: GPT-5.4 Outperforms Industry Professionals

Building on GPT-5.2’s general reasoning capabilities, GPT-5.4 delivers more consistent and polished results on real-world tasks critical to professionals. It translates abstract reasoning into high-quality, actionable output.

Sur le site Indice de référence GDPval, which tests an agent’s ability to produce well-specified knowledge work across 44 distinct occupations, GPT-5.4 achieved a new state-of-the-art. It matched or exceeded industry professionals in 83.0% of comparisons, a substantial jump from GPT-5.2’s 70.9% rate. This demonstrates GPT-5.4’s superior capacity for high-level professional automation.

Installing and Using the New ChatGPT for Excel Add-in

For financial professionals and data analysts, OpenAI has launched the official ChatGPT for Excel add-in.

When tested on internal spreadsheet modeling tasks typical for a junior investment banking analyst, GPT-5.4 achieved a mean score of 87.3%, vastly outperforming the previous 68.4% score.

Automating Presentations, Legal Contracts, and Complex Documents

GPT-5.4 excels at creating long-horizon deliverables. In presentation tasks, human raters preferred GPT-5.4’s output 68.0% of the time due to stronger aesthetics and effective use of image generation.

For legal practitioners, GPT-5.4 sets a new standard, scoring 91% on the BigLaw Bench for structuring complex transactional analysis and maintaining accuracy across lengthy contracts.

API Developer Guide: Tool Search and the 1M Context Window in GPT-5.4

For developers managing large ecosystems of tools, GPT-5.4 introduces game-changing efficiencies that prevent context-window crowding.

How the New “Tool Search” Saves Tokens and Lowers Latency

Previously, all tool definitions had to be included upfront, wasting thousands of tokens. The new Tool Search feature allows the model to receive a lightweight list and look up specific tool definitions only when needed.

This innovation dramatically reduces latency. On Scale’s MCP Atlas benchmark, the tool-search configuration successfully reduced total token usage by 47% without sacrificing any accuracy.

Configuring the 1 Million Token Window for Long-Horizon Tasks

When deploying agents for long-horizon deliverables, managing context is critical. The 1M token context window allows agents to plan, execute, and verify complex tasks securely.

Developers can easily integrate this massive context via the API to process entire codebases or dense regulatory databases in a single prompt.

ChatGPT 5.4 Pricing, Cost Efficiency, and Token Limits

Because GPT-5.4 is highly token-efficient, it uses significantly fewer tokens to solve problems compared to GPT-5.2. Understanding the full breakdown of GPT-5.4 pricing is crucial for developers optimizing these long-horizon workflows.

Token Usage, Batch Pricing, and Speed Improvements vs. Legacy Models

While the base price per token is higher to reflect its advanced capabilities, the reduced token usage often results in cheaper overall requests.

Data source: OpenAI API Pricing . Batch and Flex pricing are also available at half the standard API rate for non-urgent tasks.

Safety, Privacy, and ZDR: Is ChatGPT 5.4 Secure for Enterprise?

OpenAI maintains a precautionary approach to deployment, treating GPT-5.4 as a “High cyber capability” model under their Preparedness Framework.

Chain-of-Thought (CoT) Controllability and Cyber Risk Mitigation

A major safety win for GPT-5.4 is its low Chain-of-Thought (CoT) controllability. This means the model cannot easily obfuscate or hide its reasoning to evade monitoring, making CoT monitoring a highly effective enterprise safety tool.

Additionally, OpenAI offers Zero Data Retention (ZDR) surfaces with asynchronous blocking for higher-risk requests to ensure strict enterprise data privacy.

Conclusion: Maximizing Your Workflow and Agents with ChatGPT 5.4

The release of ChatGPT 5.4 completely redefines what is possible for knowledge workers and developers alike. By integrating native computer use, a highly efficient Tool Search system, and up to 1 million tokens of context, it empowers users to automate complex, multi-step workflows. Whether you are utilizing the mid-response steering in the Thinking model, executing visual debugging with Codex, or crunching data via the new Excel add-in, GPT-5.4 offers unparalleled precision. Upgrade your AI toolset today and experience the state-of-the-art capabilities of OpenAI’s 2026 frontier model.