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

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Create upload

client.Uploads.New(ctx, body) (*Upload, error)

post /uploads

Creates an intermediate Upload object that you can add Parts to. Currently, an Upload can accept at most 8 GB in total and expires after an hour after you create it.

Once you complete the Upload, we will create a File object that contains all the parts you uploaded. This File is usable in the rest of our platform as a regular File object.

For certain purpose values, the correct mime_type must be specified. Please refer to documentation for the supported MIME types for your use case.

For guidance on the proper filename extensions for each purpose, please follow the documentation on creating a File.

Returns the Upload object with status pending.

Parameters

  • body UploadNewParams

    • Bytes param.Field[int64]

      The number of bytes in the file you are uploading.

    • Filename param.Field[string]

      The name of the file to upload.

    • MimeType param.Field[string]

      The MIME type of the file.

      This must fall within the supported MIME types for your file purpose. See the supported MIME types for assistants and vision.

    • Purpose param.Field[FilePurpose]

      The intended purpose of the uploaded file.

      See the documentation on File purposes.

    • ExpiresAfter param.Field[UploadNewParamsExpiresAfter]

      The expiration policy for a file. By default, files with purpose=batch expire after 30 days and all other files are persisted until they are manually deleted.

      • Anchor CreatedAt

        Anchor timestamp after which the expiration policy applies. Supported anchors: created_at.

        • const CreatedAtCreatedAt CreatedAt = "created_at"
      • Seconds int64

        The number of seconds after the anchor time that the file will expire. Must be between 3600 (1 hour) and 2592000 (30 days).

Returns

  • type Upload struct{…}

    The Upload object can accept byte chunks in the form of Parts.

    • ID string

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

    • Bytes int64

      The intended number of bytes to be uploaded.

    • CreatedAt int64

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

    • ExpiresAt int64

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

    • Filename string

      The name of the file to be uploaded.

    • Object Upload

      The object type, which is always "upload".

      • const UploadUpload Upload = "upload"
    • Purpose string

      The intended purpose of the file. Please refer here for acceptable values.

    • Status UploadStatus

      The status of the Upload.

      • const UploadStatusPending UploadStatus = "pending"

      • const UploadStatusCompleted UploadStatus = "completed"

      • const UploadStatusCancelled UploadStatus = "cancelled"

      • const UploadStatusExpired UploadStatus = "expired"

    • File FileObject

      The File object represents a document that has been uploaded to OpenAI.

      • ID string

        The file identifier, which can be referenced in the API endpoints.

      • Bytes int64

        The size of the file, in bytes.

      • CreatedAt int64

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

      • Filename string

        The name of the file.

      • Object File

        The object type, which is always file.

        • const FileFile File = "file"
      • Purpose FileObjectPurpose

        The intended purpose of the file. Supported values are assistants, assistants_output, batch, batch_output, fine-tune, fine-tune-results, vision, and user_data.

        • const FileObjectPurposeAssistants FileObjectPurpose = "assistants"

        • const FileObjectPurposeAssistantsOutput FileObjectPurpose = "assistants_output"

        • const FileObjectPurposeBatch FileObjectPurpose = "batch"

        • const FileObjectPurposeBatchOutput FileObjectPurpose = "batch_output"

        • const FileObjectPurposeFineTune FileObjectPurpose = "fine-tune"

        • const FileObjectPurposeFineTuneResults FileObjectPurpose = "fine-tune-results"

        • const FileObjectPurposeVision FileObjectPurpose = "vision"

        • const FileObjectPurposeUserData FileObjectPurpose = "user_data"

      • Status FileObjectStatus

        Deprecated. The current status of the file, which can be either uploaded, processed, or error.

        • const FileObjectStatusUploaded FileObjectStatus = "uploaded"

        • const FileObjectStatusProcessed FileObjectStatus = "processed"

        • const FileObjectStatusError FileObjectStatus = "error"

      • ExpiresAt int64

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

      • StatusDetails string

        Deprecated. For details on why a fine-tuning training file failed validation, see the error field on fine_tuning.job.

Example

package main

import (
  "context"
  "fmt"

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

func main() {
  client := openai.NewClient(
    option.WithAPIKey("My API Key"),
  )
  upload, err := client.Uploads.New(context.TODO(), openai.UploadNewParams{
    Bytes: 0,
    Filename: "filename",
    MimeType: "mime_type",
    Purpose: openai.FilePurposeAssistants,
  })
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", upload.ID)
}

Response

{
  "id": "id",
  "bytes": 0,
  "created_at": 0,
  "expires_at": 0,
  "filename": "filename",
  "object": "upload",
  "purpose": "purpose",
  "status": "pending",
  "file": {
    "id": "id",
    "bytes": 0,
    "created_at": 0,
    "filename": "filename",
    "object": "file",
    "purpose": "assistants",
    "status": "uploaded",
    "expires_at": 0,
    "status_details": "status_details"
  }
}