GPT 5.4 Pro represents OpenAI's maximum-performance tier within the GPT 5.4 family, purpose-built for the most demanding professional workflows that require deep reasoning and multi-step execution. This variant extends the frontier model's unified architecture with enhanced reasoning capabilities optimized for complex, high-stakes tasks where precision and reliability matter most. It inherits the industry-leading coding foundation from GPT 5.3-Codex while introducing native computer-use capabilities, enabling it to operate across software environments, manage large tool ecosystems, and handle professional document work including spreadsheets and presentations with substantially improved accuracy.

The model demonstrates measurable progress on difficult benchmarks including ARC-AGI-2, BrowseComp, GPQA Diamond, and FrontierMath Tier 4, reflecting capabilities that set new performance standards for reasoning-intensive work. With support for extended contexts exceeding one million tokens, GPT 5.4 Pro excels at long-document analysis, agentic coding, and multi-step problem solving where extended reasoning chains produce better outcomes. Step-by-step instruction following and token efficiency make it particularly effective for workflows requiring sustained logical coherence over long contexts, positioning it as a strong choice for enterprise-grade applications and professional knowledge work.