Discover OpenAI's GPT-5.4 Model

GPT-5.4 offers advanced capabilities for coding and multimodal analysis.

Input: text · image · file Output: text Context: 1,050,000 tokens Release: 2026-03-05

OpenAI's GPT-5.4, released on March 5, 2026, combines the Codex and GPT lines into a unified model. With a context window exceeding 1 million tokens, it supports text, image, and file inputs, making it ideal for complex reasoning and multimodal tasks. This model excels in coding, document understanding, and tool usage, generating high-quality code and synthesizing information efficiently. Whether for general tasks or software engineering, GPT-5.4 streamlines workflows with enhanced performance and reduced iterations.

Use Cases

Here are a few ways teams apply OpenAI: GPT-5.4 in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.

Generate production-quality code

Synthesize information from multiple sources

Execute complex workflows with fewer iterations

Perform multimodal analysis in one workflow

Understand and process documents effectively

Key Features

A quick look at the capabilities that make this model useful in real projects.

1M+ token context window

Supports text, image, and file inputs

Improved coding and document understanding

Efficient multi-step workflow execution

Enhanced instruction following

High-context reasoning capabilities

Specs

Overview

Vendor
openai

Model ID
openai/gpt-5.4

Release
2026-03-05

Modalities & context

Input
text · image · file

Output
text

Context
1,050,000 tokens

Parameters & defaults

Supported parameters: include_reasoning, max_tokens, reasoning, response_format, seed, structured_outputs, tool_choice, tools

Defaults: temperature 0.2, top_p 0.95

Benchmark tests: OpenAI: GPT-5.4

We ran this model against a few representative prompts to show its range. Review the outputs below and be the judge.

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Chat with GPT-5.4

up.end

/ˌəpˈend/

verb

To “upend” means to completely disrupt, overturn, or drastically change the established order or structure of something. It implies a significant shift or alteration that can potentially have far-reaching consequences. When something is upended, it is turned upside down or transformed in a way that challenges conventional norms or expectations. The term often carries a sense of innovation, transformation, and sometimes even a hint of upheaval, indicating that the changes are not just minor adjustments but rather a fundamental reimagining of the status quo.

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