[markstuart-oai]

Summary

Change the output format for later Responses calls by adding a configuration update to input. Use parse_as to choose the Python type that reads the answer.

Changes

• Set configuration_update.text.format to a JSON schema or to {"type": "text"}. Retrieved input items expose the same format. A reasoning-only update keeps the active format.
• Pass parse_as to synchronous or asynchronous responses.parse(). It selects the local parser. If supplied, text_format still sets the top-level request schema.

response = client.responses.parse(
    model=model,
    previous_response_id=previous.id,
    input=[
        {"type": "configuration_update", "text": {"format": detailed_format}},
        {"role": "user", "content": "Include the evidence."},
    ],
    parse_as=AnswerWithEvidence,
)

On a later request that carries only a previous response ID and a new message, pass parse_as=AnswerWithEvidence to keep reading that type locally.