Tackle science, mathematics, and complex programming challenges with extended reasoning
GPT-5 pro is OpenAI's GPT-5 extended reasoning version for highly challenging tasks, focused on analyzing problems more comprehensively rather than merely providing short answers. It is particularly suited to scientific, mathematical, and complex programming work, and can also understand images. On this platform, tasks can be organized through Responses or Chat Completions to obtain text analysis, solution explanations, and code suggestions.
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["ACEDATACLOUD_API_KEY"],
base_url="https://api.acedata.cloud/v1",
)
response = client.responses.create(
model="gpt-5-pro",
input="Hello!",
)
print(response.output_text)
Choose an available protocol for this model. OpenAI SDK uses a Base URL ending in /v1; Anthropic SDK uses the root URL. See each guide for protocol-specific parameters, tools and response formats.
Specifications and API features
Clarify capacity, input/output, and invocation methods before selecting a model.
Native positioning
GPT-5 extended reasoning variant
Input and output
Text, image understanding; text responses
Focus areas
Science, mathematics, programming, and health problem analysis
Responses endpoint
POST Responses; use model and input
Chat endpoint
POST Chat Completions; use model and messages
Text and image organization
Chat Completions messages can combine text and image_url
Native context window
400,000 tokens
Native maximum output
272,000 tokens
Extended reasoning is the native model positioning; the parameter organization differs between the two endpoints, and optional control features should be used according to the applicable scope of the endpoint and model in use.
Core Capabilities
Learn what gpt-5-pro can bring to your work.
Break Down and Analyze Complex Problems
The core feature of GPT-5 pro is extended reasoning, making it suitable for tasks that require organizing assumptions, deriving relationships, and comparing options. When asking a question, you can provide constraints, known conditions, and evaluation criteria at the same time, so the response structures its reasoning around these conditions and explains the boundaries within which its conclusions hold, rather than simply delivering an isolated answer.
Focus on Science, Mathematics, and Programming
Science, mathematics, and programming are areas of strength explicitly emphasized for GPT-5 pro. It can be used to explain complex concepts, assist with mathematical derivations, analyze code issues, and discuss implementation trade-offs. For difficult problems, it is recommended to request key supporting evidence, verifiable steps, and assumptions requiring confirmation, making it easier to continue calculations, testing, or human review.
Combine Image Understanding Tasks
In addition to text, GPT-5 pro also has visual understanding capabilities and can analyze charts, diagrams, or interface screenshots. Submitting an image together with a specific question is more valuable than simply asking for a description of the image; for example, specify that it should focus on the meaning of coordinates, structural relationships, or anomalous locations to obtain a textual explanation that is useful for subsequent processing.
Applicable Scenarios
Start with specific tasks to find where the model can be effective.
Technical Solution Review
Provide requirements, system constraints, candidate designs, and relevant code snippets, and ask the model to compare the assumptions, implementation complexity, and potential failure points of each option. Deliverables can be review comments, issue lists, and validation plans, making this suitable for organizing difficult points before formal development and helping teams continue discussions around the same set of conditions.
Mathematics and Research Assistance
Submit a problem, symbol definitions, experimental background, or existing derivations, and have the model explain key relationships, check the reasoning, and propose directions for next-step validation. You can ask it to distinguish known facts, derived conclusions, and assumptions, producing a problem-solving explanation or research discussion outline; when quantitative conclusions are involved, verify the results again with independent calculations.
Joint Troubleshooting of Charts and Code
Put error messages, relevant code, and interface screenshots into the task, explain the expected behavior and actual differences, and have the model summarize possible causes and provide a troubleshooting sequence. The output can include modification suggestions, test cases, and information that needs to be supplemented; testing is still performed in the development environment, after which the results can be brought back for further analysis.
How to choose this model
Choose based on task complexity, input materials, and expected results.
How to choose between it and GPT-5 thinking
GPT-5 pro differs in its deeper extended reasoning, making it suitable for tasks that prioritize answer completeness and complex problem analysis. For routine explanations, rewrites, or simple Q&A, you do not need to default to Pro; when a question involves multiple constraints, difficult derivations, or critical technical trade-offs, compare the delivery quality of both on the same task.
Distinguishing it from o3-pro and subsequent Pro models
GPT-5 pro replaced o3-pro when it was released, but it is not a collective term for all Pro models. gpt-5.2-pro, gpt-5.4-pro, and others are different versions, and their capacity or control methods cannot be applied here directly. Existing workflows can first validate gpt-5-pro with representative difficult problems, focusing on whether conclusions, formatting, and verification steps meet requirements.
Start with a specific task
Based on the characteristics of gpt-5-pro, first validate small tasks with results that can be checked.
01
Multi-perspective review of scientific arguments
You can ask directly: For this scientific hypothesis, provide supporting reasons, possible counterexamples, and validation experiments; specify which conclusions come from the materials and which still require measurement; finally, list the most important uncertainties first.
02
Prepare inputs that support judgment
Allow time and output budget for complex reasoning; independently verify calculations, citations, and conclusions, and do not treat Pro as a guarantee of correctness.
03
Then integrate it into your workflow
Use the full model ID gpt-5-pro, first confirm the public request format and available parameters on the API page, then connect your application. Preserve result parsing, exception handling, and relevant evidence, and evaluate with the same set of real samples whether it is suitable for continued use.
Usage Boundaries
Before formal use, understand the output quality and scope of capabilities.
Extended reasoning does not mean conclusions are necessarily correct. Mathematical proofs may omit conditions, scientific explanations may rely on unstated assumptions, and code suggestions may not suit the actual dependency environment. When used for important decisions, retain the problem conditions and verification records; health analysis should only assist in understanding issues and cannot replace professional diagnosis and treatment.
Visual understanding should be based on clear, complete images. Small text, blurry coordinates, or cropped structures can affect judgment, so it is best to provide relevant text and units. The image capabilities here are for analyzing and explaining input content; text responses should not be treated as image files that have already been generated or edited.
Tool definitions do not mean the model has already performed an operation. Program execution, external queries, and system modifications require the application to connect the corresponding tools and return results; likewise, do not assume that audio, file, or search options in an interface are all capabilities of this model. For document tasks, the main text can be extracted first, and relevant content submitted as needed for the question.
Frequently Asked Questions
Answers to common questions about using gpt-5-pro.
What are the main differences between GPT-5 pro and standard GPT-5?
Pro is an extended reasoning version for more difficult tasks, focused on answer quality and completeness rather than merely changing writing style. It is more worthwhile for complex scientific analysis, mathematical derivations, or programming arguments; for routine tasks, start with standard GPT-5 and decide whether to use Pro based on the actual results delivered.
Which endpoint should I use to call GPT-5 pro?
Both endpoints can use model: "gpt-5-pro". Responses submits tasks through input, while Chat Completions organizes conversations through messages. Existing applications can continue using their corresponding data structures; when processing responses, note that the returned objects differ, and do not mix request fields and parsing methods.
How can I have GPT-5 pro analyze images?
Combine text and image_url in the message content of Chat Completions, and clearly state what you want analyzed. For chart tasks, it is best to provide units, context, and areas of focus; for screenshot tasks, provide the expected behavior. The model delivers textual understanding and recommendations and should not be used as a drawing feature.
Should I set the reasoning level to the highest?
GPT-5 pro is itself an extended reasoning model, so you should not treat every level in shared parameters as an available option for it. Start with a basic request, clearly specify task conditions and delivery requirements, then adjust according to the controls that actually apply; level names also cannot guarantee that an answer is correct.
Can GPT-5 pro directly fix and run code?
It can analyze code, propose changes, and suggest tests, but submitting a question once does not mean the code has run in your environment. When execution is needed, have the application connect to controlled tools or have a developer run tests, then submit the logs and results to the model to continue confirming whether the fix is effective.