AI

GPT-5.4

Model Overview

GPT-5.4 (gpt-5-4) is a major frontier model release from OpenAI, officially launched on March 5, 2026. Initially framed as a more affordable yet highly capable model for coding and professional work, the GPT-5.4 family introduced profound advancements in reasoning, deep web research, and agentic workflows.

The model family includes multiple tiers to balance cost and performance:

• GPT-5.4 Pro: The smartest version for precise and complex reasoning.
• GPT-5.4 mini: A highly capable, cost-efficient model for coding, computer use, and subagents.
• GPT-5.4 nano: The cheapest tier intended for simple, high-volume tasks.
• GPT-5.4 Thinking: A variant specifically designed to output an upfront "plan" of its reasoning process.

Note: As of July 2026, GPT-5.4 is largely considered a legacy generation, having been succeeded by the GPT-5.5 series and the flagship GPT-5.6 family (Sol, Terra, and Luna).

Capabilities

GPT-5.4 brought a paradigm shift to AI capabilities, featuring:

• Native Computer-Use: The ability to natively interact with desktop environments, manage spreadsheets, and control applications.
• Advanced Reasoning: The ability (specifically in the Thinking variant) to formulate and output a deliberate reasoning plan before executing an answer.
• Massive Context: A 1-million-token context window allowing for the ingestion of entire codebases, massive document libraries, or lengthy conversation histories.
• Robust Tool-Use: Deep integrations for web research and calling external APIs seamlessly.

Example Use Cases

• Agentic Computer Interaction: Powering AI assistants that can visually and programmatically control a user's computer to complete workflow tasks like data entry or email management.
• Deep Document Analysis: Utilizing the 1-million-token context window to analyze hundreds of legal documents, financial reports, or entire software repositories at once.
• Complex Software Development: Using GPT-5.4 mini or Pro in subagent architectures to plan, write, and test software applications autonomously.

Performance & Benchmarks

At its launch, GPT-5.4 established new state-of-the-art records across major LLM benchmarks for reasoning, coding, and tool use. Its massive context window showed near-perfect retrieval accuracy, and its computer-use capabilities marked a significant step forward in autonomous agent evaluations compared to GPT-5.3 iterations.

Intended Use & Limitations

• Intended Use: General-purpose professional work, high-volume automated tasks (via the nano tier), and complex autonomous agent workflows (via the Pro and mini tiers). It is accessible as an API-only service.
• Limitations: While highly capable, it is now a legacy model. Users requiring the absolute highest reasoning capabilities or more modern modalities are encouraged to use the GPT-5.6 flagship series. Additionally, its native computer-use functionality requires strict sandboxing to prevent unintended system modifications.

About OpenAI

OpenAI is an artificial intelligence research and deployment company dedicated to ensuring that artificial general intelligence (AGI) benefits all of humanity. They are the creators of the GPT series of large language models, including ChatGPT and Codex, fundamentally advancing the state-of-the-art in natural language processing and agentic workflows.