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GPT-5 Pro

OpenAIProprietaryPending Human Review

GPT-5 Pro is the separately named high-compute GPT-5 reasoning tier, first available in ChatGPT and later in the Responses API. It spends more computation on difficult questions and prioritizes accuracy and completeness over response speed. The API supports only high reasoning effort, and some requests require minutes; background execution is useful for such jobs.

2025-08-07
Unreleased
Undisclosed proprietary architecture
Proprietary

Specifications

Parameters
Unreleased
Architecture
Undisclosed proprietary architecture
License
Proprietary
Context Window
400,000 tokens
Max Output
272,000 tokens
Training Data Cutoff
Sep 30, 2024
Type
multimodal
Modalities
textimage

Benchmark Scores

Advanced Specifications

Model Family
GPT-5
API Access
Available
Chat Interface
Not Available
Variants
gpt-5-pro-2025-10-06

Capabilities & Limitations

Capabilities
deep reasoningcodemathvision
Known Limitations
Can produce incorrect factual claims or code; important results require independent verification.Higher compute can increase response latency to several minutes.
Notable Use Cases
difficult research questionsmathematical reasoningtechnical analysis
Function Calling Support
Yes
Tool Use Support
Yes

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