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cli/resources/uploads/subresources/parts/index.md 2026-05-05 23:00 UTC to 2026-05-07 21:57 UTC

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Parts

Add upload part

$ openai uploads:parts create

post /uploads/{upload_id}/parts

Adds a Part to an Upload object. A Part represents a chunk of bytes from the file you are trying to upload.

Each Part can be at most 64 MB, and you can add Parts until you hit the Upload maximum of 8 GB.

It is possible to add multiple Parts in parallel. You can decide the intended order of the Parts when you complete the Upload.

Parameters

  • --upload-id: string

    The ID of the Upload.

  • --data: string

    The chunk of bytes for this Part.

Returns

  • upload_part: object { id, created_at, object, upload_id }

    The upload Part represents a chunk of bytes we can add to an Upload object.

    • id: string

      The upload Part unique identifier, which can be referenced in API endpoints.

    • created_at: number

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

    • object: "upload.part"

      The object type, which is always upload.part.

    • upload_id: string

      The ID of the Upload object that this Part was added to.

Example

openai uploads:parts create \
  --api-key 'My API Key' \
  --upload-id upload_abc123 \
  --data 'Example data'

Response

{
  "id": "id",
  "created_at": 0,
  "object": "upload.part",
  "upload_id": "upload_id"
}

Domain Types

Upload Part

  • upload_part: object { id, created_at, object, upload_id }

    The upload Part represents a chunk of bytes we can add to an Upload object.

    • id: string

      The upload Part unique identifier, which can be referenced in API endpoints.

    • created_at: number

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

    • object: "upload.part"

      The object type, which is always upload.part.

    • upload_id: string

      The ID of the Upload object that this Part was added to.