Key takeaways

• GPT-5.4 Pro is an OpenAI proprietary model designed for complex, high-stakes professional tasks such as scientific research, legal analysis, and financial modeling, aiming for maximum performance in these domains.
• It utilizes a unified architecture with enhanced multi-path reasoning and analytical depth, featuring a 1 million+ token context window, native computer-use, and state-of-the-art agentic tool use, built on a Mixture of Experts (MoE) architecture.
• The model exhibits notable capabilities for agentic applications due to its native computer-use and advanced tool integration, making it versatile for complex decision-making scenarios.
• Despite its advanced capabilities, evaluation on the TutorBench dataset shows an accuracy of approximately 51.91% and it suffers from very high latency, with an average content generation time exceeding 124 seconds (124179ms), and P95 latency at 288 seconds.
• The significant latency issues, with P90 duration at 227 seconds and P95 at 288 seconds, pose considerable challenges for real-time applications, despite its robust design for high-stakes tasks.

Technical specifications

Context length

1M tokens

Max output

—

Architecture

MoE

Modalities

text+image+file->text

Parameters

—

Open weights

No

Licence

Proprietary

Regions

USA

Vendor

OpenAI

Provider model key

openai/gpt-5.4-pro-2026-03-05