curl -X POST 'https://api.openai.com/v1/evals/eval-id' \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{}'

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

> Update an eval

## 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/evals/eval-id' \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| eval_id | path | string | Yes | The ID of the evaluation to update. |
| name | body | string | No | Rename the evaluation. |
| metadata | body | object | No | Set of 16 key-value pairs that can be attached to an object. This can be usef... |

## Response example
{"object":"eval","id":"string"}

---
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POST

POST /evals/{eval_id} — OpenAI API

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

OpenAI API

Update an eval

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
→ 225 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/evals/eval-id' \  -H "Authorization: Bearer $OPENAI_API_KEY" \  -H 'Content-Type: application/json' \  -d '{}'

Parameters

Name	In	Type	Required	Description
eval_id	path	string	Yes	The ID of the evaluation to update.
name	body	string	No	Rename the evaluation.
metadata	body	object	No	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 200 OK

{
  "object": "eval",
  "id": "string",
  "name": "Chatbot effectiveness Evaluation",
  "data_source_config": {
    "type": "custom",
    "schema": {
      "type": "object",
      "properties": {
        "item": {
          "type": "object",
          "properties": {
            "label": {
              "type": "string"
            }
          },
          "required": [
            "label"
          ]
        }
      },
      "required": [
        "item"
      ]
    }
  },
  "testing_criteria": [
    {
      "type": "label_model",
      "name": "string",
      "model": "string",
      "input": [
        {
          "role": "user",
          "content": "string",
          "type": "message"
        }
      ],
      "labels": [
        "string"
      ],
      "passing_labels": [
        "string"
      ]
    }
  ],
  "created_at": 0,
  "metadata": {}
}

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