Implementation:Openai Openai python Response Custom Tool Call Input Done

Knowledge Sources	Openai_Openai_python OpenAI API Reference
Domains	API_Types, Responses_API
Last Updated	2026-02-15 00:00 GMT

Overview

Concrete streaming event type indicating that input for a custom tool call is complete, provided by the openai-python SDK.

Description

ResponseCustomToolCallInputDoneEvent is a Pydantic model representing the streaming event emitted when the model has finished generating all input data for a custom tool call. It provides the complete input string, the item_id of the associated API item, the output_index, a sequence_number for event ordering, and a fixed type of "response.custom_tool_call_input.done". This event arrives after all corresponding delta events for the same custom tool call. This type is auto-generated from the OpenAI OpenAPI specification by Stainless.

Usage

Import ResponseCustomToolCallInputDoneEvent when handling streaming events and you need to receive the finalized input data for a custom tool call in a single event.

Code Reference

Source Location

• Repository: openai-python
• File: src/openai/types/responses/response_custom_tool_call_input_done_event.py

Signature

class ResponseCustomToolCallInputDoneEvent(BaseModel):
    """Event indicating that input for a custom tool call is complete."""

    input: str
    item_id: str
    output_index: int
    sequence_number: int
    type: Literal["response.custom_tool_call_input.done"]

Import

from openai.types.responses import ResponseCustomToolCallInputDoneEvent

I/O Contract

Fields

Name	Type	Required	Description
input	str	Yes	The complete input data for the custom tool call.
item_id	str	Yes	Unique identifier for the API item associated with this event.
output_index	int	Yes	The index of the output this event applies to.
sequence_number	int	Yes	The sequence number of this event.
type	Literal["response.custom_tool_call_input.done"]	Yes	The event type identifier.

Usage Examples

from openai.types.responses import ResponseCustomToolCallInputDoneEvent

# Handle completed custom tool call input
for event in stream:
    if isinstance(event, ResponseCustomToolCallInputDoneEvent):
        print(f"Custom tool call input complete for item {event.item_id}")
        print(f"Full input: {event.input}")
        # Now execute the custom tool with the complete input
        result = execute_custom_tool(event.input)

Related Pages

• Environment:Openai_Openai_python_Python_3_9_Plus