GPT-5-PRO
GPT-5-PRO is a chat model developed by OpenAI, capable of handling a wide range of tasks, including text generation, reasoning, and function calling. It is genuinely best at handling complex, extended thinking and reasoning tasks, thanks to its large context window of 128,000 tokens.
Input
Output
Context
128K
Max Output
272K
Parameters
-
Technical Specifications
Model TypeChat
Context Window128,000 tokens
Max Output Tokens272,000 tokens
ParametersNot available
Release DateOct 3, 2025
Training CutoffSep 30, 2024
Licenseproprietary
Open SourceNo
Input Modalities
ImageText
Output Modalities
Text
Capabilities
Resources & Links
proprietary, Proprietary - API access only
Related Tools
Data sourced from official provider APIs and documentation
Last updated: Jun 23, 2026
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