GPT-5.4 Pro
Overview
GPT-5.4 Pro is the highest-performance variant in the GPT-5.4 family, allocating more compute for deeper reasoning to produce smarter and more precise answers on complex, high-stakes tasks. Available exclusively via the Responses API, some requests may take several minutes to complete, making it ideal for accuracy-critical professional use cases.
Key Features
- Enhanced Deep Reasoning: Allocates significantly more reasoning compute, outperforming the standard model on math, science, and complex coding problems.
- 1M+ Native Context: Natively supports 1,050,000 token context (922K input + 128K output) without additional configuration.
- Unified Capability Inheritance: Inherits all GPT-5.4 capabilities including Computer Use, Tool Search, and configurable reasoning effort.
- Responses API Exclusive: Available only via the Responses API, specifically optimized for complex tasks requiring deep thinking.
Best Use Cases
- High-Stakes Decision Support: Ideal for financial analysis, legal reasoning, medical diagnostic assistance, and other professional domains requiring extreme accuracy.
- Complex Research & Analysis: The 1M+ context window and deep reasoning make it perfect for cross-document research and systematic analysis.
- Advanced Coding Challenges: Excels on frontier coding benchmarks, suitable for large-scale code refactoring, architecture design, and complex bug diagnosis.
- Enterprise AI Agents: Powers autonomous agent systems requiring the highest reasoning quality, suitable for critical business process automation.
Capabilities and Limitations
| Capability | Detailed Description |
|---|---|
| Reasoning Ability | Strongest reasoning in the GPT-5.4 family; ranks #1 out of 104 models (overall score 92/100). SWE-bench Pro 57.7%, OSWorld 75% (surpassing 72.4% human expert baseline), GDPval 83%. Configurable reasoning effort: medium, high, xhigh. |
| Creative Ability | Inherits GPT-5.4's creative capabilities with 128K max output; deeper reasoning improves structured creative tasks like technical writing and system design documents. |
| Multimodal Ability | Supports text and image input with text output; image understanding and analysis on par with GPT-5.4 standard. |
| Tool Use | Agentic tool use score 88.9 (#1 of 104 models). Supports Computer Use, Tool Search, and multi-step workflow orchestration. |
| Response Speed | Slower — some complex requests may take several minutes, not suitable for low-latency scenarios. |
| Context Window | 1,050,000 tokens (922K input + 128K output), natively supported without additional configuration. |
| Max Output | 128,000 tokens |
| Knowledge Cutoff | August 31, 2025 |
Credits and Pricing
| Model | Input (Credits/Token) | Output (Credits/Token) |
|---|---|---|
| GPT-5.4 Pro | 30.00 | 180.00 |
Limitations
- High latency: Complex requests may take several minutes; not suitable for real-time or low-latency applications.
- Cost: It is one of the most expensive API models available.
- No audio/video input: Multimodal support is limited to text and image input.