Check whether GPT-5 is available in the ChatGPT app or web interface for your account
Sign in to your OpenAI account
Select GPT-5 from the model picker if it appears
Upgrade to a plan that includes GPT-5 if required
Use the OpenAI API and choose the GPT-5 model name if you have API access
Review OpenAI’s official documentation for current availability and access requirements
Join any waitlist or request access if GPT-5 is not yet enabled for your account