OptionalformatAn object specifying the format that the model must output.
Configuring { "type": "json_schema" } enables Structured Outputs, which
ensures the model will match your supplied JSON schema. Learn more in the
Structured Outputs guide.
The default format is { "type": "text" } with no additional options.
Not recommended for gpt-4o and newer models:
Setting to { "type": "json_object" } enables the older JSON mode, which
ensures the message the model generates is valid JSON. Using json_schema is
preferred for models that support it.
Configuration options for a text response from the model. Can be plain text or structured JSON data. Learn more: