Represents the url or content of an image generated by the OpenAI API.

Parameter	Type	Description
b64_json	string	Base64-encoded JSON of the generated image if response_format is b64_json
url	string	URL of the generated image if response_format is url (default)
revised_prompt	string	The prompt used to generate the image if any revisions were made to the prompt

{
  "url": "...",
  "revised_prompt": "..."
}