GPT-5 Pro overview
GPT-5 Pro by OpenAI
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 specs
- Model ID
openai/gpt-5-pro- Developer
- OpenAI
- Context window
- 400,000 tokens
- Max output
- 272,000 tokens
- Input
- Text
- Output
- Text
- API
- OpenAI-compatible, base URL
https://api.aimlapi.com/v1
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
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
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
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.
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
Capabilities
- Function calling
- Streaming
- Structured outputs
- Reasoning
- Web search
GPT-5 Pro API pricing
| Usage | Price | Unit |
|---|---|---|
| Input | $15.87 | 1M tokens |
| Output | $126.96 | 1M tokens |
Prices from the AI/ML API price list, checked on Nov 4, 2026.
GPT-5 Pro vs other models: token prices
AI/ML API input and output rates for 5 models, per million tokens.
| Model | Input | Output |
|---|---|---|
 GPT-5 Pro | $15.87 | $126.96 |
| GPT-6 Luna | $0.1 | $0.5 |
| GPT-6.1 Terra | $1 | $5 |
| GPT-6.1 Sol | $2 | $10 |
| GPT-6.1 Terra Pro | $2.12 | $10.58 |
How to use the GPT-5 Pro API
View docs
Build with your agent
Give your agent the model details, code and documentation.
1Get your API key
Create API keyexport AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"2Make your first request
curl 'https://api.aimlapi.com/v1/chat/completions' \
-H "Authorization: Bearer $AIMLAPI_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "openai/gpt-5-pro",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "openai/gpt-5-pro",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}
response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = await fetch("https://api.aimlapi.com/v1/chat/completions", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"model": "openai/gpt-5-pro",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());Models similar to GPT-5 Pro
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GPT-5 Pro FAQ
What is the context window of GPT-5 Pro?
GPT-5 Pro has a 400,000 tokens context window and can return up to 272,000 tokens.
What inputs and outputs does GPT-5 Pro support?
GPT-5 Pro takes image, text as input and returns text.
What is the model ID for GPT-5 Pro?
Use openai/gpt-5-pro as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
When was GPT-5 Pro released?
GPT-5 Pro became available on November 21, 2025.
How much does GPT-5 Pro cost?
GPT-5 Pro costs $15.87 input and $126.96 output per 1M tokens on AI/ML API, billed as you go with no subscription.
Does GPT-5 Pro support streaming?
Yes, GPT-5 Pro can stream responses as they are generated.
Can GPT-5 Pro read images?
Yes, GPT-5 Pro accepts image input alongside text.
Who created GPT-5 Pro?
GPT-5 Pro was built by OpenAI.
Does GPT-5 Pro support web search?
Yes, GPT-5 Pro includes web search as a feature alongside tool use and reasoning capabilities.