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go/resources/uploads/subresources/parts/index.md 2026-05-02 05:57 UTC to 2026-05-05 23:00 UTC

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Parts

Add upload part

client.Uploads.Parts.New(ctx, uploadID, body) (*UploadPart, error)

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

  • uploadID string

  • body UploadPartNewParams

    • Data param.Field[Reader]

      The chunk of bytes for this Part.

Returns

  • type UploadPart struct{…}

    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.

    • CreatedAt int64

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

    • Object UploadPart

      The object type, which is always upload.part.

      • const UploadPartUploadPart UploadPart = "upload.part"
    • UploadID string

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

Example

package main

import (
  "bytes"
  "context"
  "fmt"
  "io"

  "github.com/openai/openai-go"
  "github.com/openai/openai-go/option"
)

func main() {
  client := openai.NewClient(
    option.WithAPIKey("My API Key"),
  )
  uploadPart, err := client.Uploads.Parts.New(
    context.TODO(),
    "upload_abc123",
    openai.UploadPartNewParams{
      Data: io.Reader(bytes.NewBuffer([]byte("Example data"))),
    },
  )
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", uploadPart.ID)
}

Response

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

Domain Types

Upload Part

  • type UploadPart struct{…}

    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.

    • CreatedAt int64

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

    • Object UploadPart

      The object type, which is always upload.part.

      • const UploadPartUploadPart UploadPart = "upload.part"
    • UploadID string

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