curl -X POST 'https://api.openai.com/v1/uploads/upload_abc123/complete' \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "part_ids": [
    "example-part-ids"
  ]
}'

# POST /uploads/{upload_id}/complete (OpenAI API)
Base URL: https://api.openai.com/v1
Auth: Authorization; OpenAI API key; required.
Request formats: application/json.
Last verified: 2026-10-20

> Complete upload

## Critical Gotchas
* The Responses API is the primary interface for new text and tool workflows; Chat Completions remains a separate compatibility API.
* Audio transcription uploads use multipart form data rather than a JSON request body.

## cURL
curl -X POST 'https://api.openai.com/v1/uploads/upload_abc123/complete' \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "part_ids": [
    "example-part-ids"
  ]
}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| upload_id | path | string | Yes | The ID of the Upload.  |
| part_ids | body | string[] | Yes | The ordered list of Part IDs.  |
| md5 | body | string | No | The optional md5 checksum for the file contents to verify if the bytes upload... |

## Response example
{"id":"string","created_at":0}

---
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POST

POST /uploads/{upload_id}/complete — OpenAI API

OpenAI API key (required); https://api.openai.com/v1

OpenAI API

Complete upload

Base URL: https://api.openai.com/v1
Auth: Authorization: Bearer <OPENAI_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 229 tokens · Vary: Accept

Critical gotchas

The Responses API is the primary interface for new text and tool workflows; Chat Completions remains a separate compatibility API.

Audio transcription uploads use multipart form data rather than a JSON request body.

cURL

curl -X POST 'https://api.openai.com/v1/uploads/upload_abc123/complete' \  -H "Authorization: Bearer $OPENAI_API_KEY" \  -H 'Content-Type: application/json' \  -d '{  "part_ids": [    "example-part-ids"  ]}'

Parameters

Name	In	Type	Required	Description
upload_id	path	string	Yes	The ID of the Upload.
part_ids	body	string[]	Yes	The ordered list of Part IDs.
md5	body	string	No	The optional md5 checksum for the file contents to verify if the bytes uploaded matches what you expect.

Response 200 OK

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

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