References an image File in the content of a message.

The text content that is part of a message.

A citation within the message that points to a specific quote from a specific File associated with the assistant or the message. Generated when the assistant uses the "retrieval" tool to search files.

A URL for the file that's generated when the assistant used the code_interpreter tool to generate a file.

A list of files attached to a message.

Represents a message within a thread.