GPT-5 Pro stands at the pinnacle of current large language model technology, providing unparalleled accuracy and reasoning power for enterprise applications.
GPT-5 Pro API Overview
GPT-5 Pro is OpenAI’s most advanced large language model, designed for enterprise-grade applications that demand superior accuracy, depth, and reliability. As part of the unified GPT-5 system, GPT-5 Pro delivers best-in-class performance with state-of-the-art reasoning capabilities, optimized token efficiency, and support for highly complex, mission-critical tasks. It surpasses previous generations in coding, analysis, and professional use-cases, setting new benchmarks in AI intelligence.
Technical Specifications
Model Type: Large multimodal language model (text-focused; no audio/image generation)
Architecture: Transformer-based with parallel test-time compute for enterprise-level rigor
Context Window: Up to 400,000 tokens total (272k input + 128k output)
Reasoning Modes: Integrated with high reasoning effort mode for complex tasks
Multimodal Reasoning: Supports text, image, audio, and video inputs for comprehensive multimodal understanding and generation
Instruction & Code Generation: Enhanced accuracy for following complex instructions and generating high-quality code
Structured Outputs: Robust support for producing structured data outputs, including JSON and other schema-compliant formats
Tool-Calling & Reasoning: Improved performance and reliability in tool integrations, such as Python execution, browsing, and APIs, alongside advanced multi-step reasoning capabilities
Architecture Efficiency: Utilizes scaled parallel compute during inference to increase token processing efficiency and output depth
Performance Benchmarks
Accuracy: 88.4% accuracy on the General Purpose Question Answering benchmark (GPQA), highest among GPT-5 modes
Mathematics Benchmark: Perfect 100% score on AIME 2025 with Python tool integrations, excelling in high-school to college-level problem-solving
Complex Reasoning: 293% accuracy improvement on multi-step problems compared to GPT-4o
Token Cost Efficiency: Despite premium pricing, cost per correct answer is highly competitive due to fewer retries and smarter token utilization
Latency: Moderate response time due to deeper reasoning and parallel computations, optimized for enterprise workflows
Performance Benchmarks
Key Features
Enterprise-Grade Rigor: Designed for mission-critical environments such as healthcare, finance, and biopharma
Depth of Reasoning: Tackles multi-step and layered reasoning tasks with unparalleled accuracy
Robustness: Significantly fewer hallucinations and errors compared to GPT-4o and previous GPT-5 variants
Versatile Use-Cases: Scalable for customer support systems, AI-powered automation, strategic decision-making, and scientific research
Smart Routing: Integrated within GPT-5 system’s intelligent router for automatic selection of reasoning effort
Key Features
GPT-5 Pro API Pricing
Input: $15.75
Output: $126.00
Use Cases
Complex customer service automation with deep understanding of queries
Financial and biopharma data analysis requiring high precision
Advanced coding assistance with multi-step debugging
Scientific research and technical documentation generation
Strategic business decision support systems
Code Sample
Comparison with Other Models
vs GPT-5: GPT-5 Pro focuses on deep reasoning, complex instruction accuracy, and enterprise-level tool usage with slower but higher-quality outputs. GPT-5 is faster for everyday tasks but lacks the extensive context window and reasoning depth of Pro.
vs GPT-4o: GPT-5 Pro significantly outperforms GPT-4o in accuracy and reasoning, exemplified by a 94.6% score on the AIME 2025 math test versus GPT-4o’s 71%. Pro also brings a vastly improved context window, multimodal support, and fewer factual errors, albeit with slower response times.
vs OpenAI o3: Compared to o3, GPT-5 Pro has superior problem-solving ability, multimodal integration, and structured output generation. It also boasts higher accuracy and better handling of complex, real-world tasks though at a higher computational cost.
vs Claude Opus 4.1: Claude Opus 4.1 excels in polished outputs and narrative flow with high reliability, whereas GPT-5 Pro leads in multi-modal reasoning, enterprise-grade robustness, and tool-based workflows. GPT-5 Pro’s reasoning and technical task handling surpass Claude’s general writing strengths.
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