Batch

Create batch

Changed on Oct 6, 2026

Creates and executes a batch from an uploaded file of requests

post/batches

Request

Base URL
https://api.openai.com/v1
URL
https://api.openai.com/v1/batches
Auth
HTTP bearer

Request body

input_file_idstring required

The ID of an uploaded file that contains requests for the new batch.

See upload file for how to upload a file.

Your input file must be formatted as a JSONL file, and must be uploaded with the purpose batch. The file can contain up to 50,000 requests, and can be up to 200 MB in size.

The endpoint to be used for all requests in the batch. Currently /v1/responses, /v1/chat/completions, /v1/embeddings, /v1/completions, /v1/moderations, /v1/images/generations, /v1/images/edits, and /v1/videos are supported. Note that /v1/embeddings batches are also restricted to a maximum of 50,000 embedding inputs across all requests in the batch.

completion_window'24h' required

The time frame within which the batch should be processed. Currently only 24h is supported.

metadataMetadata nullable

Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format, and querying for objects via API or the dashboard.

Keys are strings with a maximum length of 64 characters. Values are strings with a maximum length of 512 characters.

Response

Batch created successfully.

idstring required

object'batch' required

The object type, which is always batch.

endpointstring required

The OpenAI API endpoint used by the batch.

modelstring

Model ID used to process the batch, like gpt-6-astra. OpenAI offers a wide range of models with different capabilities, performance characteristics, and price points. Refer to the model guide to browse and compare available models.

input_file_idstring required

The ID of the input file for the batch.

completion_windowstring required

The time frame within which the batch should be processed.

The current status of the batch.

output_file_idstring nullable

The ID of the file containing the outputs of successfully executed requests.

error_file_idstring nullable

The ID of the file containing the outputs of requests with errors.

created_atinteger required

The Unix timestamp (in seconds) for when the batch was created.

in_progress_atinteger nullable

The Unix timestamp (in seconds) for when the batch started processing.

expires_atinteger nullable

The Unix timestamp (in seconds) for when the batch will expire.

finalizing_atinteger nullable

The Unix timestamp (in seconds) for when the batch started finalizing.

completed_atinteger nullable

The Unix timestamp (in seconds) for when the batch was completed.

failed_atinteger nullable

The Unix timestamp (in seconds) for when the batch failed.

expired_atinteger nullable

The Unix timestamp (in seconds) for when the batch expired.

cancelling_atinteger nullable

The Unix timestamp (in seconds) for when the batch started cancelling.

cancelled_atinteger nullable

The Unix timestamp (in seconds) for when the batch was cancelled.