curl -X POST 'https://api.openai.com/v1/fine_tuning/alpha/graders/validate' \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "grader": {
    "type": "string_check",
    "name": "example-name",
    "input": "example-input",
    "reference": "example-reference",
    "operation": "eq"
  }
}'

# POST /fine_tuning/alpha/graders/validate (OpenAI API)
Base URL: https://api.openai.com/v1
Auth: Authorization; OpenAI API key; required.
Request formats: application/json.
Last verified: 2026-10-20

> Validate grader

## 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/fine_tuning/alpha/graders/validate' \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "grader": {
    "type": "string_check",
    "name": "example-name",
    "input": "example-input",
    "reference": "example-reference",
    "operation": "eq"
  }
}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| grader | body | object | Yes | The grader used for the fine-tuning job. |

## Response example
{"grader":{"type":"string_check","name":"string"}}

---
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POST

POST /fine_tuning/alpha/graders/validate — OpenAI API

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

OpenAI API

Validate grader

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
→ 192 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/fine_tuning/alpha/graders/validate' \  -H "Authorization: Bearer $OPENAI_API_KEY" \  -H 'Content-Type: application/json' \  -d '{  "grader": {    "type": "string_check",    "name": "example-name",    "input": "example-input",    "reference": "example-reference",    "operation": "eq"  }}'

Parameters

Name	In	Type	Required	Description
grader	body	object	Yes	The grader used for the fine-tuning job.

Response 200 OK

{
  "grader": {
    "type": "string_check",
    "name": "string",
    "input": "string",
    "reference": "string",
    "operation": "eq"
  }
}

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