GPT-5
FrontierClosed weightsTextReasoning
GPT-5 family model by OpenAI.
About the GPT-5 family
OpenAI's August 2025 flagship that unified fast responses and deep reasoning in one system, with effort settings from minimal to high. The '(ChatGPT)' variant is the consumer-tuned router version.
All GPT-5 modelsHow this one is configured
This configuration runs in reasoning mode (thinks step-by-step before answering).
Also runs at: minimal · low · medium · high effort
Effort controls how long the model thinks before answering — higher effort usually means better answers on hard problems, at the cost of speed and money. Same model underneath, so they share this page.